Question 1

Which of the following elements are the least reactive?

Accepted Answer

A)  Alkali metals
B)  Noble gases
C)  Halogens
D)  Alkaline earth metals
E)  MetalloidsF) B) and D)
G) All of the above

Question 2

Which of the following compounds is ionic?

Accepted Answer

A)  PF 3
B)  CS 2
C)  HCl
D)  SO 2
E)  MgCl 2F) B) and D)
G) None of the above

Question 3

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: −5.92; −4.44; −2.96; −8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

Accepted Answer

A)  −1.11
B)  −1.48
C)  −2.22
D)  −2.96
E)  −5.55F) B) and E)
G) None of the above B

Question 4

J. J. Thomson studied cathode ray particles (electrons)  and was able to measure the mass/charge ratio. His results showed that

Accepted Answer

A)  the mass/charge ratio varied with as the cathode material was changed.
B)  the charge was always a whole-number multiple of some minimum charge.
C)  matter included particles much smaller than the atom.
D)  atoms contained dense areas of positive charge.
E)  atoms are largely empty space.F) B) and D)
G) A) and D)

Question 5

What is the name of BBr3?

Accepted Answer

A)  Boron bromide
B)  Boric bromide
C)  Boron tribromide
D)  Tribromoboride
E)  Bromine triborideF) B) and E)
G) A) and B)

Question 6

Which, if any, of the following elements do not occur in the major classes of organic compounds?

Accepted Answer

A)  H
B)  C
C)  N
D)  O
E)  All of these choices are correct.F) D) and E)
G) A) and B)

Question 7

The substance, CoCl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Accepted Answer

A)  Cobalt dichloride
B)  Cobalt(II) chloride
C)  Cobalt chloride
D)  Cobaltic chloride
E)  Copper(II) chlorideF) None of the above
G) A) and B)

Question 8

Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

Accepted Answer

A)  261.97 amu
B)  238.98 amu
C)  161.97 amu
D)  138.98 amu
E)  74.99 amuF) A) and C)
G) A) and D)

Question 9

Compound 1 has a composition of 46.7 mass % of element A and 53.3 mass % of element B. A and B also form a second binary compound (compound 2) . If the compositions of the two compounds are consistent with the law of multiple proportions, which of the following compositions could be that of compound 2?

Accepted Answer

A)  23.4 mass % A 76.6 mass % B
B)  30.4 mass % A 69.6 mass % B
C)  33.3 mass % A 66.7 mass % B
D)  53.3 mass % A 46.7 mass % B
E)  73.3 mass % A 26.7 mass % BF) A) and E)
G) B) and D)

Question 10

Which one of the following combinations of names and formulas is incorrect?

Accepted Answer

A)  H 3PO 4 phosphoric acid
B)  HNO 3 nitric acid
C)  NaHCO 3 sodium carbonate
D)  H 2CO 3 carbonic acid
E)  KOH potassium hydroxideF) A) and E)
G) D) and E)

Question 11

Rutherford bombarded gold foil with alpha (α)  particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Accepted Answer

A)  The small size of the nucleus
B)  The charge on the nucleus
C)  The total mass of the atom
D)  The existence of protons
E)  The presence of electrons outside the nucleusF) B) and C)
G) A) and D) C

Question 12

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81,  . Select the combination which lists the correct atomic number, neutron number, and mass number, respectively.

Accepted Answer

A)  35, 46, 81
B)  35, 81, 46
C)  81, 46, 35
D)  46, 81, 35
E)  35, 81, 116F) A) and B)
G) C) and E)

Question 13

What is the name of the acid formed when HCN gas is dissolved in water?

Accepted Answer

A)  Cyanic acid
B)  Hydrocyanic acid
C)  Cyanous acid
D)  Hydrocyanous acid
E)  Hydrogen cyanideF) B) and C)
G) C) and E)

Question 14

The compound, (NH4) 2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Accepted Answer

A)  Ammonium sulfide
B)  Diammonium sulfide
C)  Ammonium sulfite
D)  Ammonia(I) sulfite
E)  Ammonium(I) sulfideF) C) and D)
G) All of the above A

Question 15

Which of the following compounds is covalent?

Accepted Answer

A)  CaCl 2
B)  MgO
C)  Al 2O 3
D)  Cs 2S
E)  PCl 3F) D) and E)
G) A) and D)

Question 16

Which of the following symbols does not represent an element?

Accepted Answer

A)  O 2
B)  Co
C)  HF
D)  Cs
E)  XeF) None of the above
G) B) and E)

Question 17

Which of the following is a nonmetal?

Accepted Answer

A)  Lithium, Li, Z = 3
B)  Bromine, Br, Z = 35
C)  Mercury, Hg, Z = 80
D)  Bismuth, Bi, Z = 83
E)  Sodium, Na, Z = 11F) A) and B)
G) B) and D)

Question 18

The colorless substance, MgF2, is used in the ceramics and glass industry. What is its name?

Accepted Answer

A)  Magnesium difluoride
B)  Magnesium fluoride
C)  Magnesium(II) fluoride
D)  Monomagnesium difluoride
E)  None of these choices are correctF) C) and E)
G) A) and B)

Question 19

Which of the following is a metalloid?

Accepted Answer

A)  Carbon, C, Z = 6
B)  Sulfur, S, Z = 16
C)  Germanium, Ge, Z = 32
D)  Iridium, Z = 77
E)  Bromine, Br, Z = 35F) A) and D)
G) B) and E)

Question 20

Modern studies have shown that the Law of Multiple Proportions is not valid.

Accepted Answer

A) True 
 B)False

Exam 2: The Components of Matter

Which of the following elements are the least reactive?

Correct Answer
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Which of the following compounds is ionic?

Correct Answer
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In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: −5.92; −4.44; −2.96; −8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

Correct Answer
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B

J. J. Thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio. His results showed that

Correct Answer
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What is the name of BBr₃?

Correct Answer
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Which, if any, of the following elements do not occur in the major classes of organic compounds?

Correct Answer
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The substance, CoCl₂, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Correct Answer
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Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

Correct Answer
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Correct Answer
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Which one of the following combinations of names and formulas is incorrect?

Correct Answer
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Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Correct Answer
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C

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81, . Select the combination which lists the correct atomic number, neutron number, and mass number, respectively.

Correct Answer
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What is the name of the acid formed when HCN gas is dissolved in water?

Correct Answer
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The compound, (NH₄) ₂S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Correct Answer
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A

Which of the following compounds is covalent?

Correct Answer
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Which of the following symbols does not represent an element?

Correct Answer
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Which of the following is a nonmetal?

Correct Answer
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The colorless substance, MgF₂, is used in the ceramics and glass industry. What is its name?

Correct Answer
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Which of the following is a metalloid?

Correct Answer
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Modern studies have shown that the Law of Multiple Proportions is not valid.

Correct Answer
verified

Exam 2: The Components of Matter

Which of the following elements are the least reactive?

Correct AnswerverifiedShow Answer

Which of the following compounds is ionic?

Correct AnswerverifiedShow Answer

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: −5.92; −4.44; −2.96; −8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

Correct AnswerverifiedB

J. J. Thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio. His results showed that

Correct AnswerverifiedShow Answer

What is the name of BBr3?

Correct AnswerverifiedShow Answer

Which, if any, of the following elements do not occur in the major classes of organic compounds?

Correct AnswerverifiedShow Answer

The substance, CoCl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Correct AnswerverifiedShow Answer

Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which one of the following combinations of names and formulas is incorrect?

Correct AnswerverifiedShow Answer

Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Correct AnswerverifiedC

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81, . Select the combination which lists the correct atomic number, neutron number, and mass number, respectively.

Correct AnswerverifiedShow Answer

What is the name of the acid formed when HCN gas is dissolved in water?

Correct AnswerverifiedShow Answer

The compound, (NH4) 2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Correct AnswerverifiedA

Which of the following compounds is covalent?

Correct AnswerverifiedShow Answer

Which of the following symbols does not represent an element?

Correct AnswerverifiedShow Answer

Which of the following is a nonmetal?

Correct AnswerverifiedShow Answer

The colorless substance, MgF2, is used in the ceramics and glass industry. What is its name?

Correct AnswerverifiedShow Answer

Which of the following is a metalloid?

Correct AnswerverifiedShow Answer

Modern studies have shown that the Law of Multiple Proportions is not valid.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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B

Correct Answer
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What is the name of BBr₃?

Correct Answer
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Correct Answer
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The substance, CoCl₂, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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C

Correct Answer
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Correct Answer
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The compound, (NH₄) ₂S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Correct Answer
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A

Correct Answer
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Correct Answer
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Correct Answer
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The colorless substance, MgF₂, is used in the ceramics and glass industry. What is its name?

Correct Answer
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Correct Answer
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Correct Answer
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