1.1 Multiple Choice Questions
1) What is the chemical symbol for tin?
A) Sb
B) Sn
C) Ta
D) Ti Answer: B Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
2) What is the chemical symbol for manganese?
A) Hg
B) Mg
C) Mn
D) Na Answer: C Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
3) What is the chemical symbol for platinum?
A) P
B) Pa
C) Pt
D) Pu Answer: C Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
4) Which element has the chemical symbol, P?
A) lead
B) phosphorus
C) platinum
D) potassium Answer: B Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
5) Which element has the chemical symbol, Au?
A) aluminum
B) argon
C) gold
D) silver Answer: C Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
6) Mendeleev arranged the elements according to
A) atomic number and atomic weight.
B) atomic weight and chemical reactivity.
C) electron configuration and atomic weight.
D) physical state and relative abundance. Answer: B
Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
7) Which is not true?
A) Mendeleev ended each row in his periodic table with an inert gas.
B) Mendeleev left gaps in his periodic table for undiscovered elements.
C) Mendeleev ordered the elements in his periodic table by atomic weight.
D) Mendeleev's periodic table predated the concept of electron configuration. Answer: A
Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
8) The horizontal rows of the periodic table are called
A) groups.
B) periods.
C) triads.
D) elements. Answer: B Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
9) The vertical columns of the periodic table are called
A) groups.
B) periods.
C) triads.
D) elements. Answer: A Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
10) Lithium belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
11) Bromine belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
12) Argon belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth
C) halogen
D) noble gas Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
13) Calcium belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth
C) halogen
D) noble gas Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
14) Most elements in the periodic table are
A) metals.
B) non-metals.
C) noble gases.
D) semi-metals. Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
15) Elements in a periodic group have similar
A) chemical properties.
B) densities.
C) masses.
D) physical properties.
Answer: A
Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
16) Which of the following elements has chemical properties similar to oxygen?
A) fluorine
B) hydrogen
C) nitrogen
D) sulfur Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
17) Which horizontal row of the periodic table contains the most elements?
A) row 4
B) row 5
C) row 6
D) They all contain the same number of elements. Answer: C
Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
18) Which of the following statements does not describe a physical property of chlorine?
A) Chlorine combines with sodium to form table salt.
B) The color of chlorine gas is green.
C) The density of chlorine gas at standard temperature and pressure is 3.17 g/L.
D) The freezing point of chlorine is -101°C. Answer: A
Diff: 2
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
19) Which of the following statements does not describe a chemical property of oxygen?
A) Iron will rust in the presence of oxygen.
B) Oxygen combines with carbon to form carbon dioxide gas.
C) The pressure is caused by collision of oxygen molecules with the sides of a container.
D) When coal is burned in oxygen, the process is called combustion. Answer: C
Diff: 2
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
20) Which of the following underlined items is not an intensive property?
A) A chemical reaction requires 3.00 g of oxygen.
B) Solid copper hydroxide is blue colored.
C) The density of helium at 25°C is 1.64 × 10-4 g/cm3.
D) The melting point of aluminum metal is 933 K. Answer: A
Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
21) Which of the following underlined items is not an extensive property?
A) the color of a cobalt compound
B) the diameter of a soap bubble
C) the mass of a diamond
D) the volume of a glucose solution Answer: A
Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
22) Which group 1A element is not a metal?
A) H
B) Li
C) Fr
D) none of these Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
23) Which group 5A element is most metallic?
A) N
B) P
C) Sb
D) Bi Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
24) Which of the following elements is a liquid at room temperature?
A) chlorine
B) helium
C) mercury
D) sodium Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
25) Which group of elements reacts violently with water?
A) halogens
B) noble gases
C) alkali metals
D) alkaline earth metals Answer: C
Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
26) Which of the following elements is not a solid at room temperature?
A) Ag
B) Al
C) Br
D) Fe Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
27) Which of the following elements is classified as a semimetal?
A) calcium
B) germanium
C) fluorine
D) uranium Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
28) Which of the following elements is a good conductor of heat and electricity?
A) carbon
B) chlorine
C) neon
D) zinc Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
29) Which one of the following elements is a poor conductor of heat and electricity?
A) copper
B) fluorine
C) iron
D) lead Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
30) Gaseous elements characterized by low reactivity are found in group _ of the periodic table.
A) 5A
B) 6A
C) 7A
D) 8A Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
31) All of the following elements are nonmetals except
A) antimony.
B) carbon.
C) hydrogen.
D) oxygen. Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
32) What group of elements does the shaded area in the following periodic table indicate?
A) alkali metals
B) alkaline earth metals
C) inner transition metals
D) transition metals Answer: D
Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
33) 1What group of elements does the shaded area in the following periodic table indicate?
A) alkali metals
B) alkaline earth metals
C) inner transition metals
D) transition metals Answer: C
Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
34) What group of elements does the shaded area in the following periodic table indicate?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
35) What group of elements does the shaded area in the following periodic table indicate?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
36) What group of elements does the shaded area in the following periodic table indicate?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
37) What group of elements does the shaded area in the following periodic table indicate?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
38) What group of elements does the shaded area in the following periodic table indicate?
A) gases
B) metals
C) nonmetals
D) semimetals Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
39) What group of elements does the shaded area in the following periodic table indicate?
A) gases
B) metals
C) nonmetals
D) semimetals Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
40) What group of elements does the shaded area in the following periodic table indicate?
A) gases
B) metals
C) nonmetals
D) semimetals Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
41) Which element is most chemically similar to the element indicated by the letter E in the following periodic table?
A) A
B) B
C) C
D) D Answer: B Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
42) Which element is most chemically similar to the element indicated by the letter E in the following periodic table?
A) A
B) B
C) C
D) D Answer: D Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
43) Which element is most chemically similar to the element indicated by the letter E in the following periodic table?
A) A
B) B
C) C
D) D Answer: C Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
44) Which element indicated by letter in the following periodic table reacts rapidly with water to form an alkaline solution?
A) A
B) B
C) C
D) D Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
45) Which element indicated by letter in the following periodic table reacts rapidly with water to form an alkaline solution?
A) A
B) B
C) C
D) D Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
46) Which element indicated by letter in the following periodic table reacts rapidly with water to form an alkaline solution?
A) A
B) B
C) C
D) D Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
47) Which element indicated by letter in the following periodic table is a gas at room temperature?
A) A
B) B
C) C
D) D Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
48) Which element indicated by letter in the following periodic table is a gas at room temperature?
A) A
B) B
C) C
D) D Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
49) Which element indicated by letter in the following periodic table is a gas at room temperature?
A) A
B) B
C) C
D) D Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
50) Which element indicated by letter in the following periodic table is the poorest conductor of electricity and heat?
A) A
B) B
C) C
D) D Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
51) Which element indicated by letter in the following periodic table is the best conductor of electricity and heat?
A) A
B) B
C) C
D) D Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
52) The observation that 15.0 g of hydrogen reacts with 120.0 g of oxygen to form 135.0 g of water is evidence for the law of
A) definite proportions.
B) energy conservation.
C) mass conservation.
D) multiple proportions.
Answer: C
Diff: 1
Topic: Section 1.4 A Bit of History: The Conservation of Mass and the Law of Definite Proportions
53) The observation that 4.0 g of hydrogen reacts with 32.0 g of oxygen to form a product with O:H mass ratio = 8:1, and 6.0 g of hydrogen reacts with 48.0 g of oxygen to form the same product with O/H mass ratio = 8:1 is evidence for the law of
A) definite proportions.
B) energy conservation.
C) mass conservation.
D) multiple proportions.
Answer: A
Diff: 1
Topic: Section 1.4 A Bit of History: The Conservation of Mass and the Law of Definite Proportions
54) A sample of pure lithium carbonate contains 18.8% lithium by mass. What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?
A) 9.40%
B) 18.8%
C) 37.6%
D) 75.2%
Answer: B Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory Algo. Option: algorithmic
55) A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 45.0 g of calcium fluoride?
A) 2.56 g
B) 7.70 g
C) 15.0 g
D) 23.1 g
Answer: D Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory Algo. Option: algorithmic
56) The observation that hydrogen and oxygen can react to form two compounds with different chemical and physical properties, one having an O:H mass ratio = 8:1 and the other having an O:H mass ratio = 16:1 is consistent with the law of
A) definite proportions.
B) energy conservation.
C) mass conservation.
D) multiple proportions.
Answer: D
Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
57) Which of the following statements is not a postulate of Dalton's atomic theory?
A) Each element is characterized by the mass of its atoms.
B) Atoms are composed of protons, neutrons, and electrons.
C) Chemical reactions only rearrange atomic combinations.
D) Elements are composed of atoms. Answer: B
Diff: 1
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
58) Which of the following is a part of Dalton's atomic theory?
A) Atoms are rearranged but not changed during a chemical reaction.
B) Atoms break down during radioactive decay.
C) Atoms contain protons, neutrons, and electrons.
D) Isotopes of the same element have different masses. Answer: A
Diff: 1
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
59) Which of the following is not explained by Dalton's atomic theory?
A) conservation of mass during a chemical reaction
B) the existence of more than one isotope of an element
C) the law of definite proportions
D) the law of multiple proportions Answer: B
Diff: 1
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
60) Elements A and Q form two compounds, AQ and A2Q3. The mass ratio (mass Q)/(mass A) for AQ is 0.574. What is the mass ratio (mass Q)/(mass A) for A2Q3?
A) 0.383
B) 0.861
C) 1.16
D) 2.61
Answer: B Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory Algo. Option: algorithmic
61) Elements A and Q form two compounds, AQ and A2Q. Which of the following must be true?
A) (mass Q)/(mass A) is one for AQ, and 1/2 for A2Q.
B) (mass Q)/(mass A) for AQ must equal (mass Q)/(mass A) for A2Q.
C) (mass Q)/(mass A) for AQ must be 2 times (mass Q)/(mass A) for A2Q.
D) (mass Q)/(mass A) for AQ must be 1/2 (mass Q)/(mass A) for A2Q. Answer: C
Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
62) Elements A and Q form two compounds. The ratio (mass Q)/(mass A) for compound one is
0.271 and ratio (mass Q)/(mass A) for compound two is 0.362. If compound one has the chemical formula AQ, what is the chemical formula for compound two?
A) A3Q4
B) A2Q3
C) AQ2
D) AQ3 Answer: A Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory Algo. Option: algorithmic
63) The existence of electrons in atoms of all elements was demonstrated by
A) Millikan's oil drop experiment.
B) Rutherford's gold foil experiment.
C) Thomson's cathode ray tube experiment.
D) None of the above.
Answer: C
Diff: 1
Topic: Section 1.6 The Structure of Atoms: Electrons
64) The charge-to-mass ratio of an electron was established by
A) Millikan's oil drop experiment.
B) Rutherford's gold foil experiment.
C) Thomson's cathode ray tube experiment.
D) None of the above.
Answer: C
Diff: 1
Topic: Section 1.6 The Structure of Atoms: Electrons
65) The current model of the atom in which essentially all of an atom's mass is contained in a very small nucleus, whereas most of an atom's volume is due to the space in which the atom's electrons move was established by
A) Millikan's oil drop experiment.
B) Rutherford's gold foil experiment.
C) Thomson's cathode ray tube experiment.
D) None of the above.
Answer: B
Diff: 1
Topic: Section 1.7 The Structure of Atoms: Protons and Neutrons
66) The existence of neutrons in the nucleus of an atom was demonstrated by
A) Millikan's oil drop experiment.
B) Rutherford's gold foil experiment.
C) Thomson's cathode ray tube experiment.
D) None of the above.
Answer: D
Diff: 1
Topic: Section 1.7 The Structure of Atoms: Protons and Neutrons
67) Most of the alpha particles directed at a thin gold foil in Rutherford's experiment
A) bounced directly back from the foil.
B) passed directly through the foil undeflected.
C) passed through the foil but were deflected at an angle.
D) were absorbed by the foil. Answer: B
Diff: 1
Topic: Section 1.7 The Structure of Atoms: Protons and Neutrons
68) Which subatomic particle has the smallest mass?
A) a proton
B) a neutron
C) an electron
D) an alpha particle Answer: C
Diff: 1
Topic: Section 1.7 The Structure of Atoms: Protons and Neutrons
69) Which of the following two atoms are isotopes?
A) Ar and Ca
B) C and C
C) Cl and Br
D) Mg and C Answer: B
Diff: 2
Topic: Section 1.8 Atomic Numbers
70) Which are isotopes? An atom that has an atomic number of 34 and a mass number of 76 is an isotope of an atom that has
A) an atomic number of 32 and a mass number of 76.
B) an atomic number of 34 and a mass number of 80.
C) 42 neutrons and 34 protons.
D) 42 protons and 34 neutrons. Answer: B
Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
71) Which of the following represent isotopes?
A: 25
[ ] B: 21
[ ] C: 27 [ ] D: 25 [ ]
21 25
A) A and B
B) A and C
C) A and D
D) C and D Answer: B Diff: 2
21 23
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
72) The isotope represented by C is named
A) carbon-6.
B) carbon-7.
C) carbon-13.
D) carbon-19. Answer: C Diff: 1
Topic: Section 1.8 Atomic Numbers
73) Boron-9 can be represented as
A) Be.
B) B.
C) B.
D) B.
Answer: B Diff: 1
Topic: Section 1.8 Atomic Numbers
74) How many protons (p) and neutrons (n) are in an atom of Sr? A) 38 p, 52 n
B) 38 p, 90 n
C) 52 p, 38 n
D) 90 p, 38 n
Answer: A Diff: 1
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
75) How many protons (p) and neutrons (n) are in an atom of calcium-46? A) 20 p, 26 n
B) 20 p, 46 n
C) 26 p, 20 n
D) 46 p, 60 n
Answer: A Diff: 1
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
76) What is the chemical symbol for an atom that has 29 protons and 36 neutrons?
A) Cu
B) Kr
C) N
D) Tb Answer: A Diff: 1
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
77) How many electrons are in a neutral atom of iodine-131?
A) 1
B) 53
C) 54
D) 131
Answer: B Diff: 1
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
78) How many protons (p), neutrons (n), and electrons (e) are in one atom of Mg? A) 12 p, 12 n, 12 e
B) 12 p, 11 n, 12 e
C) 12 p, 11 n, 10 e
D) 12 p, 11 n, 14 e
Answer: B Diff: 1
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
79) Identify the chemical symbol of element Q in Q.
A) Br
B) Hg
C) Pd
D) Se Answer: D Diff: 1
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
80) The atoms of a particular element all have the same number of protons as neutrons. Which of the following must be true?
A) The atomic weight must be a whole number.
B) The mass number for each atom must equal the atomic weight of the element.
C) The mass number must be exactly twice the atomic number for each atom.
D) All of the above are true. Answer: C
Diff: 2
Topic: Section 1.8 Atomic Numbers
81) Fullerenes are molecules composed of only carbon atoms. One fullerene is , a carbon molecule containing 60 carbon atoms. What is the mass of one molecule?
A) 1.20 × g
B) 8.29 × g
C) 3.32 × g
D) 4.41 × g
Answer: A Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
82) Fullerenes are molecules composed of only carbon atoms. One fullerene is , a carbon molecule containing 70 carbon atoms. What is the mass of one molecule?
A) 1.40 × 1 g
B) 9.68 × g
C) 2.85 × g
D) 3.28 × g
Answer: A Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
83) Fullerenes are molecules composed of only carbon atoms. A molecule of one fullerene has a mass of 1.516 × g. How many carbon atoms are in a single molecule of this fullerene molecule?
A) 76
B) 70
C) 60
D) 84 Answer: A Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
84) Fullerenes are molecules composed of only carbon atoms. A molecule of one fullerene has a mass of 1.675 × g. How many carbon atoms are in a single molecule of this fullerene molecule?
A) 76
B) 70
C) 60
D) 84 Answer: D Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
85) The smallest sample of carbon atoms that can be observed with the naked eye has a mass of approximately 2 × 10-8 g. Given that 1 g = 6.02 × 1023 amu, and that carbon has an atomic weight of 12.01 amu, determine the number of carbon atoms present in the sample.
A) 1 × 1015
B) 1 × 1016
C) 1 × 1017
D) 6 × 1023
Answer: A Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
86) An element has two naturally occurring isotopes. One has an abundance of 37.40% and an isotopic mass of 184.953 amu, and the other has an abundance of 62.60% and a mass of 186.956 amu. What is the atomic weight of the element?
A) 185.7 amu
B) 186.0 amu
C) 186.2 amu
D) 187.0 amu Answer: C Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
87) The element antimony has an atomic weight of 121.757 amu and only two naturally- occurring isotopes. One isotope has an abundance of 57.30% and an isotopic mass of 120.904 amu. Based on these data, what is the mass of the other isotope?
A) 121.8 amu
B) 122.4 amu
C) 122.6 amu
D) 122.9 amu Answer: D Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
88) What is the standard isotope that is used to define the number of atoms in a mole?
A) 1H
B) 12C
C) 16O
D) 20Ne Answer: B Diff: 1
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
89) One mole of which element has the smallest mass?
A) Co
B) Cu
C) Ni
D) Zn Answer: C Diff: 1
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
90) 24.0 g of which element contains the greatest number of atoms?
A) B
B) C
C) N
D) O Answer: A Diff: 1
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
91) How many moles and how many atoms of zinc are in a sample weighing 34.9 g? A) 0.533 mol, 8.85 × atoms
B) 0.533 mol, 3.21 × atoms
C) 1.87 mol, 3.10 × atoms
D) 1.87 mol, 1.13 × atoms Answer: B
Diff: 2
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
92) Which statement about nuclear reactions is true?
A) New elements are never produced in a nuclear reaction.
B) Nuclear reactions involve valence electrons.
C) The rate of a nuclear reaction is affected by catalysts.
D) Tremendous amounts of energy are involved in nuclear reactions. Answer: D
Diff: 1
Topic: Section 1.10 Nuclear Chemistry: The Change of One Element into Another
93) The term "nucleons" refers to the number of _ in the atom.
A) neutrons
B) protons
C) protons and neutrons
D) protons, neutrons, and electrons Answer: C
Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
94) The number of nucleons in an atom or ion is the same as the
A) atomic number.
B) charge on the atom or ion.
C) mass number.
D) none of these Answer: C Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
95) The number of nucleons in a U2+ nucleus is A) 92.
B) 144.
C) 236.
D) 328.
Answer: C Diff: 2
Topic: Section 1.6 The Structure of Atoms: Electrons Algo. Option: algorithmic
96) The number of neutrons in Fe2+ is A) 26.
B) 29.
C) 53.
D) 55.
Answer: B Diff: 2
Topic: Section 1.6 The Structure of Atoms: Electrons
97) "Isotopes" are atoms with the same number of but different number of .
A) electrons, protons
B) neutrons, protons
C) protons, electrons
D) protons, neutrons Answer: D
Diff: 1
Topic: Section 1.8 Atomic Numbers
98) Which of the following statements is not correct when balancing a nuclear equation?
- The mass numbers must be conserved on both sides of the reaction arrow.
- The ionic charges must be conserved on both sides of the reaction arrow.
III.The atomic numbers must be conserved on both sides of the reaction arrow.
IV.The elements must be the same on both sides of the reaction arrow.
A) II only
B) II and III
C) I and III
D) II and IV Answer: D Diff: 2
Topic: Section 1.10 Nuclear Chemistry: The Change of One Element into Another
99) An alpha particle is
A) H+.
B) H+.
C) H+.
D) He2+.
Answer: D Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
100) When a substance decays by alpha radiation, the mass number of the nucleus and the atomic number .
A) increases by 4, increases by 2
B) reduces by 4, reduces by 2
C) increases by 2, increases by 4
D) reduces by 2, reduces by 4 Answer: B
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
101) The nuclear decay process that involves the particle having the greatest mass is emission.
A) alpha
B) beta
C) gamma
D) positron Answer: A Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
102) A beta particle is
A) e.
B) e.
C) p.
D) He.
Answer: A Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
103) When a substance decays by beta emission, the mass number of the nucleus and the atomic number .
A) decreases by 1, remains the same
B) increases by 1, remains the same
C) remains the same, decreases by 1
D) remains the same, increases by 1 Answer: D
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
104) Beta decay of 24Na produces a beta particle and
A) 20F.
B) 23Na.
C) 24Ne.
D) 24Mg. Answer: D Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity Algo. Option: algorithmic
105) Which of the following statements about gamma radiation is false?
A) It almost always accompanies alpha or beta emission.
B) It is a mechanism to release excess energy in the nucleus.
C) Gamma rays are high energy photons.
D) The mass number decreases by one with each gamma emitted. Answer: D
Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
106) Gamma radiation can be described as
A) a helium nucleus.
B) a negatively charged free electron.
C) high energy electromagnetic radiation.
D) a positively charged free electron. Answer: C
Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
107) A positron is
A) n.
B) p.
C) e.
D) e.
Answer: C Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
108) Positron emission changes the atomic number of an element by A) -2.
B) -1.
C) +1.
D) +2.
Answer: B Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
109) Which of the following statements about positrons is false?
A) The positron has same mass as an electron.
B) A positron is ejected from the nucleus during the conversion of a proton into a neutron.
C) A positron is a positive electron.
D) When positron emission occurs, the atomic number of the nucleus increases. Answer: D
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
110) Which of the following statements about electron capture is false?
A) The electron is used to convert a proton to a neutron.
B) The electron involved is most likely an outer shell valence electron.
C) In electron capture decay, the atomic number decreases by one.
D) In electron capture decay, the mass number remains unchanged. Answer: B
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
111) Which one of the following processes does not result in transmutation to another element?
A) alpha emission
B) beta emission
C) electron capture
D) gamma emission Answer: D
Diff: 1
Topic: Section 1.11 Nuclear Change and Radioactivity
112) Which of the following decay processes give a product nuclide whose atomic number is one less than the starting nuclide?
A) alpha decay
B) beta decay and positron decay
C) gamma decay and beta decay
D) positron decay and electron capture Answer: D
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
113) Which reaction below represents O decay by positron emission?
A) O → e + Ra
B) O → e + N
C) O → e + O
D) O → e + O Answer: B
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
114) Which reaction below represents Th decay by alpha emission?
A) Th → He + Ra
B) Th → He + Ra
C) Th → p + Ac
D) Th → n + Th Answer: A
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
115) Which reaction below represents Ti decay by electron capture?
A) Ti + e → Ti
B) Ti + e → Ti
C) Ti + e → Ti
D) Ti + e → Sc Answer: D
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
116) In addition to a beta particle, what is the other product of beta decay of I?
A) Sb
B) Te
C) Xe
D) Cs
Answer: C Diff: 3
Topic: Section 1.11 Nuclear Change and Radioactivity Algo. Option: algorithmic
117) Tritium, H, is formed in the upper atmosphere when N captures a neutron and then decays. What is the other product of this reaction?
A) C
B) C
C) B
D) B
Answer: B Diff: 3
Topic: Section 1.11 Nuclear Change and Radioactivity
118) Assume that the mixture of substances in drawing (1) undergoes a chemical reaction. Which of the drawings (2)-(4) represents a product mixture that is consistent with the law of mass conservation?
A) drawing (2)
B) drawing (3)
C) drawing (4) Answer: B Diff: 2
Topic: Section 1.4 A Bit of History: The Conservation of Mass and the Law of Definite Proportions
119) Assume that the mixture of substances in drawing (1) undergoes a chemical reaction. Which of the drawings (2)-(4) represents a product mixture that is consistent with the law of mass conservation?
A) drawing (2)
B) drawing (3)
C) drawing (4) Answer: C Diff: 2
Topic: Section 1.4 A Bit of History: The Conservation of Mass and the Law of Definite Proportions
120) Which of the following drawings depicts a chemical reaction consistent with Dalton's atomic theory?
A) drawing a)
B) drawing b)
C) drawing c)
D) drawing d) Answer: A Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
121) Which of the following drawings depicts a chemical reaction consistent with Dalton's atomic theory?
A) drawing a)
B) drawing b)
C) drawing c)
D) drawing d) Answer: D Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
122) If shaded and unshaded spheres represent atoms of different elements, as shown in drawing (1), which drawings (2)-(4) represent the law of multiple proportions?
A) only drawings (2) and (3)
B) only drawings (2) and (4)
C) only drawings (3) and (4)
D) drawings (2), (3), and (4) Answer: C
Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
123) If shaded and unshaded spheres represent atoms of different elements, as shown in drawing (1), which drawings (2)-(4) represent the law of multiple proportions?
A) only drawings (2) and (3)
B) only drawings (2) and (4)
C) only drawings (3) and (4)
D) drawings (2), (3), and (4) Answer: B
Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
124) If shaded and unshaded spheres represent atoms of different elements, as shown in drawing (1), which drawings (2)-(4) represent the law of multiple proportions?
A) only drawings (2) and (3)
B) only drawings (2) and (4)
C) only drawings (3) and (4)
D) drawings (2), (3), and (4) Answer: A
Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
125) If shaded and unshaded spheres represent atoms of different elements, as shown in drawing (1), which drawings (2)-(4) represent the law of multiple proportions?
A) only drawings (2) and (3)
B) only drawings (2) and (4)
C) only drawings (3) and (4)
D) drawings (2), (3), and (4) Answer: D
Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
126) If shaded and unshaded spheres represent atoms of different elements, as shown in drawing (1), which combination of drawings (2)-(4) represent the law of multiple proportions?
A) only drawings (2) and (3)
B) only drawings (2) and (4)
C) only drawings (3) and (4)
D) drawings (2), (3), and (4) Answer: D
Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory
127) Which of the following figures represents H? Unshaded spheres represent neutrons and shaded spheres represent protons.
A) figure (1)
B) figure (2)
C) figure (3)
D) figure (4) Answer: B Diff: 2
Topic: Section 1.7 The Structure of Atoms: Protons and Neutrons
128) Which of the following figures represents B? Unshaded spheres represent neutrons and shaded spheres represent protons.
A) figure (1)
B) figure (2)
C) figure (3)
D) figure (4) Answer: D Diff: 2
Topic: Section 1.6 The Structure of Atoms: Electrons
129) Which of the following figures represents N ? Unshaded spheres represent neutrons and shaded spheres represent protons.
A) figure (1)
B) figure (2)
C) figure (3)
D) figure (4) Answer: A Diff: 2
Topic: Section 1.7 The Structure of Atoms: Protons and Neutrons
130) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: D
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
131) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: D
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
132) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: B
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
133) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: B
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
134) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: A
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
135) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: A
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
136) What kind of decay process is occurring in the decay of isotope A to isotope B in the figure shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: A
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
137) What kind of decay process is occurring in the decay of isotope B to isotope C in the figure shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: B
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
138) What kind of decay process is occurring in the decay of isotope C to isotope D in the figure shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: B
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
139) What kind of decay process is occurring in the decay of isotope D to isotope E in the figure shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission Answer: A
Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity
1.2 Algorithmic Questions
1) What is the chemical symbol for antimony?
A) At
B) Sb
C) Sn
D) Am Answer: B Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
2) What is the chemical symbol for manganese?
A) Hg
B) Mg
C) Mn
D) Na Answer: C Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
3) What is the chemical symbol for platinum?
A) P
B) Pa
C) Pt
D) Pu Answer: C Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
4) Which element has the chemical symbol, P?
A) lead
B) phosphorus
C) platinum
D) potassium Answer: B Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
5) Which element has the chemical symbol, Au?
A) aluminum
B) argon
C) gold
D) silver Answer: C Diff: 1
Topic: Section 1.1 Chemistry and the Elements Algo. Option: algorithmic
6) Sodium belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
7) Fluorine belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
8) Xenon belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
9) Radium belongs to the group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
10) Which of the following elements has chemical properties similar to oxygen?
A) fluorine
B) hydrogen
C) nitrogen
D) sulfur Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
11) Which of the following elements is a gas at room temperature?
A) bromine
B) iron
C) krypton
D) sodium Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
12) Which of the following elements is not a solid at room temperature?
A) Ag
B) Al
C) Ne
D) Fe Answer: C Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
13) Which of the following elements is classified as a semimetal?
A) calcium
B) silicon
C) fluorine
D) uranium Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
14) Which of the following elements is a good conductor of heat and electricity?
A) carbon
B) chlorine
C) neon
D) silver Answer: D Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
15) Which one of the following elements is a poor conductor of heat and electricity?
A) copper
B) phosphorus
C) iron
D) lead Answer: B Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
16) All of the following elements are nonmetals except
A) arsenic.
B) carbon.
C) hydrogen.
D) oxygen. Answer: A Diff: 1
Topic: Section 1.3 Some Common Groups of Elements and Their Properties Algo. Option: algorithmic
17) A sample of pure lithium chloride contains 16.4% lithium by mass. What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?
A) 8.20%
B) 16.4%
C) 32.8%
D) 65.6%
Answer: B Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory Algo. Option: algorithmic
18) A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 30.0 g of calcium fluoride?
A) 1.71 g
B) 7.70 g
C) 15.0 g
D) 15.4 g
Answer: D Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory Algo. Option: algorithmic
19) Elements A and Q form two compounds, AQ and A2Q3. The mass ratio (mass Q)/(mass A) for AQ is 0.286. What is the mass ratio (mass Q)/(mass A) for A2Q3?
A) 0.191
B) 0.429
C) 2.33
D) 5.24
Answer: B Diff: 2
Topic: Section 1.5 More History: The Law of Multiple Proportions and Dalton's Atomic Theory Algo. Option: algorithmic
20) Which are isotopes? An atom that has an atomic number of 34 and a mass number of 76 is an isotope of an atom that has
A) an atomic number of 32 and a mass number of 76.
B) an atomic number of 34 and a mass number of 80.
C) 42 neutrons and 34 protons.
D) 42 protons and 34 neutrons. Answer: B
Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
21) Which of the following represent isotopes?
A: 46
21
[ ] B: 46 22
[ ] C: 44 21
[ ] D: 48 [ ]
23
A) A and B
B) A and C
C) A and D
D) C and D Answer: B Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
22) How many protons (p) and neutrons (n) are in an atom of Tc? A) 43 p, 55 n
B) 43 p, 98 n
C) 55 p, 43 n
D) 98 p, 43 n
Answer: A Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
23) How many protons (p) and neutrons (n) are in an atom of calcium-46? A) 20 p, 26 n
B) 20 p, 46 n
C) 26 p, 20 n
D) 46 p, 20 n
Answer: A Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
24) What is the element symbol for an atom that has 33 protons and 41 neutrons?
A) As
B) Nb
C) O
D) W Answer: A Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
25) How many electrons are in a neutral atom of iodine-131?
A) 1
B) 53
C) 54
D) 131
Answer: B Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
26) Identify the chemical symbol of element Q in Q.
A) As
B) Cl
C) P
D) S Answer: D Diff: 2
Topic: Section 1.8 Atomic Numbers Algo. Option: algorithmic
27) Copper has 2 naturally occuring isotopes, copper-63 with an atomic mass of 62.9296 and copper-65 with an atomic mass of 64.9279 amu. What is the percent abundance of copper-63? A) 69.2%
B) 30.8%
C) 51.8%
D) 48.2%
Answer: A Diff: 3
Topic: Section 1.9 Atomic Masses, Atomic Weights, and the Mole
28) The number of nucleons in a Th nucleus is A) 90.
B) 144.
C) 234.
D) 324.
Answer: C Diff: 2
Topic: Section 1.10 Nuclear Chemistry: The Change of One Element into Another Algo. Option: algorithmic
29) Beta decay of 32P produces a beta particle and
A) 28Al.
B) 31P.
C) 32Si.
D) 32S. Answer: D Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity Algo. Option: algorithmic
30) In addition to a beta particle, what is the other product of beta decay of I?
A) Sb
B) Te
C) Xe
D) Cs
Answer: C Diff: 2
Topic: Section 1.11 Nuclear Change and Radioactivity Algo. Option: algorithmic
1.3 Short Answer Questions
1) The symbol for mercury is . Answer: Hg
Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
2) The element Se can be found in period _ and group of the periodic table. Answer: 4, 6A
Diff: 1
Topic: Section 1.2 Elements and the Periodic Table
3) Sodium is an example of an metal that reacts with water to form hydrogen gas and an solution.
Answer: alkali, alkaline (basic) Diff: 2
Topic: Section 1.3 Some Common Groups of Elements and Their Properties
4) Atoms of the same element always have the same number of in their nuclei. Answer: protons
Diff: 1
Topic: Section 1.8 Atomic Numbers
5) Isotopes have the same number of but different numbers of _ in their nuclei.
Answer: protons, neutrons Diff: 2
Topic: Section 1.8 Atomic Numbers
6) The number of neutrons in a neutral atom of uranium-238 is . Answer: 146
Diff: 2
Topic: Section 1.8 Atomic Numbers
7) The number of protons, neutrons, and total nucleons in Ru are _, , and
, respectively. Answer: 44, 62, 106
Diff: 2
Topic: Section 1.8 Atomic Numbers
8) U undergoes alpha decay producing one alpha particle and a single nuclide. To balance the equation and must be added to the right side of the equation below.
U → ? + ?
Answer: Th , He Diff: 3
Topic: Section 1.11 Nuclear Change and Radioactivity
