Question 1

When calcium reacts with sulfur the compound formed is __________.

Accepted Answer

A)  Ca2S2
B)  Ca3S2
C)  CaS2
D)  CaS2
E)  Ca2S3

Question 2

The mass number of an atom of 128Xe is __________.

Accepted Answer

A)  54
B)  182
C)  74
D)  128
E)  120

Question 3

Copper and chlorine form an ionic compound whose formula is CuCl2. The name of this compound is __________.

Accepted Answer

A)  copper chlorine
B)  copper (III) dichloride
C)  monocopper dichloride
D)  copper (II) dichloride
E)  cupric chloride

Question 4

The nucleus of an atom contains __________.

Accepted Answer

A)  electrons
B)  protons, neutrons, and electrons
C)  protons and neutrons
D)  protons and electrons
E)  protons

Question 5

The formula for chromium (II)iodide is CrI2.

Accepted Answer

A) True 
 B)False

Question 6

Elements in the same group of the periodic table typically have __________.

Accepted Answer

A)  similar mass numbers
B)  similar physical properties only
C)  similar chemical properties only
D)  similar atomic masses
E)  similar physical and chemical properties

Question 7

Which isotope has 36 electrons in an atom?

Accepted Answer

A)    Kr
B)    Br
C)    Se
D)    Cl
E)    Hg

Question 8

The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu.

Accepted Answer

A)  161.75
B)  162.03
C)  162.35
D)  163.15
E)  33.33

Question 9

The name of the ionic compound V2O3 is __________.

Accepted Answer

A)  vanadium(III) oxide
B)  vanadium oxide
C)  vanadium(II) oxide
D)  vanadium(III) trioxide
E)  divanadium trioxide

Question 10

Which one of the following is the formula of hydrochloric acid?

Accepted Answer

A)  HClO3
B)  HClO4
C)  HClO
D)  HCl
E)  HClO2

Question 11

The correct name for HBrO4 is __________.

Accepted Answer

A)  hydrobromic acid
B)  perbromic acid
C)  bromic acid
D)  bromous acid
E)  hydrobromous acid

Question 12

The correct name for MgF2 is __________.

Accepted Answer

A)  monomagnesium difluoride
B)  magnesium difluoride
C)  manganese difluoride
D)  manganese bifluoride
E)  magnesium fluoride

Question 13

Gravitational forces act between objects in proportion to their __________.

Accepted Answer

A)  volumes
B)  masses
C)  charges
D)  polarizability
E)  densities

Question 14

Elements in Group 1A are known as the __________.

Accepted Answer

A)  chalcogens
B)  alkaline earth metals
C)  alkali metals
D)  halogens
E)  noble gases

Question 15

An unknown element is found to have three naturally occurring isotopes with atomic masses of 35.9675 (0.337%) , 37.9627 (0.063%) , and 39.9624 (99.600%) . Which of the following is the unknown element?

Accepted Answer

A)  Ar
B)  K
C)  Cl
D)  Ca
E)  None of the above could be the unknown element.

Question 16

An atom of 118Xe contains __________ neutrons.

Accepted Answer

A)  54
B)  172
C)  64
D)  110
E)  118

Question 17

Silver has two naturally occurring isotopes with the following isotopic masses:  Ar  Ar 106.90509 108.9047
The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is __________.

Accepted Answer

A)  0.24221
B)  0.48168
C)  0.51835
D)  0.75783
E)  0.90474

Question 18

Vertical columns of the periodic table are known as __________.

Accepted Answer

A)  metals
B)  periods
C)  nonmetals
D)  groups
E)  metalloids

Question 19

H2SeO4 is called selenic acid.

Accepted Answer

A) True 
 B)False

Question 20

The name of PCl3 is __________.

Accepted Answer

A)  potassium chloride
B)  phosphorus trichloride
C)  phosphorous(III) chloride
D)  monophosphorous trichloride
E)  trichloro potassium

Exam 2: Atoms, Molecules, and Ions

The nucleus of an atom contains __________.

Correct Answer
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Correct Answer
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An unknown element is found to have three naturally occurring isotopes with atomic masses of 35.9675 (0.337%) , 37.9627 (0.063%) , and 39.9624 (99.600%) . Which of the following is the unknown element?

Correct Answer
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H₂SeO₄ is called selenic acid.

Correct Answer
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Which one of the following is the formula of hydrochloric acid?

Correct Answer
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Elements in Group 1A are known as the __________.

Correct Answer
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Gravitational forces act between objects in proportion to their __________.

Correct Answer
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The correct name for HBrO₄ is __________.

Correct Answer
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The formula for chromium (II)iodide is CrI₂.

Correct Answer
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Which isotope has 36 electrons in an atom?

Correct Answer
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Elements in the same group of the periodic table typically have __________.

Correct Answer
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Copper and chlorine form an ionic compound whose formula is CuCl₂. The name of this compound is __________.

Correct Answer
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Vertical columns of the periodic table are known as __________.

Correct Answer
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An atom of ¹¹⁸Xe contains __________ neutrons.

Correct Answer
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When calcium reacts with sulfur the compound formed is __________.

Correct Answer
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The name of the ionic compound V₂O₃ is __________.

Correct Answer
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The correct name for MgF₂ is __________.

Correct Answer
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The mass number of an atom of ¹²⁸Xe is __________.

Correct Answer
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The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu.

Correct Answer
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The name of PCl₃ is __________.

Correct Answer
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Exam 2: Atoms, Molecules, and Ions

The nucleus of an atom contains __________.

Correct AnswerverifiedShow Answer

Silver has two naturally occurring isotopes with the following isotopic masses: Ar Ar 106.90509 108.9047 The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is __________.

Correct AnswerverifiedShow Answer

An unknown element is found to have three naturally occurring isotopes with atomic masses of 35.9675 (0.337%) , 37.9627 (0.063%) , and 39.9624 (99.600%) . Which of the following is the unknown element?

Correct AnswerverifiedShow Answer

H2SeO4 is called selenic acid.

Correct AnswerverifiedShow Answer

Which one of the following is the formula of hydrochloric acid?

Correct AnswerverifiedShow Answer

Elements in Group 1A are known as the __________.

Correct AnswerverifiedShow Answer

Gravitational forces act between objects in proportion to their __________.

Correct AnswerverifiedShow Answer

The correct name for HBrO4 is __________.

Correct AnswerverifiedShow Answer

The formula for chromium (II)iodide is CrI2.

Correct AnswerverifiedShow Answer

Which isotope has 36 electrons in an atom?

Correct AnswerverifiedShow Answer

Elements in the same group of the periodic table typically have __________.

Correct AnswerverifiedShow Answer

Copper and chlorine form an ionic compound whose formula is CuCl2. The name of this compound is __________.

Correct AnswerverifiedShow Answer

Vertical columns of the periodic table are known as __________.

Correct AnswerverifiedShow Answer

An atom of 118Xe contains __________ neutrons.

Correct AnswerverifiedShow Answer

When calcium reacts with sulfur the compound formed is __________.

Correct AnswerverifiedShow Answer

The name of the ionic compound V2O3 is __________.

Correct AnswerverifiedShow Answer

The correct name for MgF2 is __________.

Correct AnswerverifiedShow Answer

The mass number of an atom of 128Xe is __________.

Correct AnswerverifiedShow Answer

The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu.

Correct AnswerverifiedShow Answer

The name of PCl3 is __________.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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H₂SeO₄ is called selenic acid.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The correct name for HBrO₄ is __________.

Correct Answer
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The formula for chromium (II)iodide is CrI₂.

Correct Answer
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Correct Answer
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Correct Answer
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Copper and chlorine form an ionic compound whose formula is CuCl₂. The name of this compound is __________.

Correct Answer
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Correct Answer
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An atom of ¹¹⁸Xe contains __________ neutrons.

Correct Answer
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Correct Answer
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The name of the ionic compound V₂O₃ is __________.

Correct Answer
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The correct name for MgF₂ is __________.

Correct Answer
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The mass number of an atom of ¹²⁸Xe is __________.

Correct Answer
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Correct Answer
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The name of PCl₃ is __________.

Correct Answer
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