Question 1

Vanadium has two naturally occurring isotopes, 50V with an atomic mass of 49.9472 amu and 51V with an atomic mass of 50.9440. The atomic weight of vanadium is 50.9415. The percent abundances of the vanadium isotopes are ________% 50V and ________% 51V.

Accepted Answer

A)  0.25, 99.75
B)  99.75, 0.25
C)  49, 51
D)  1.0, 99
E)  99, 1.0

Question 2

The correct name for Al2O3 is ________.

Accepted Answer

A)  aluminum oxide
B)  dialuminum oxide
C)  dialuminum trioxide
D)  aluminum hydroxide
E)  aluminum trioxide

Question 3

Magnesium and sulfur form an ionic compound with the formula ________.

Accepted Answer

A)  MgS
B)  Mg2S
C)  MgS2
D)  Mg2S2
E)  Mg2S3

Question 4

Sulfur forms an ion with a charge of ________.

Accepted Answer

A)  2+
B)  2-
C)  3+
D)  6-
E)  6+

Question 5

Oxygen is a ________ and nitrogen is a ________.

Accepted Answer

A)  metal, metalloid
B)  nonmetal, metal
C)  metalloid, metalloid
D)  nonmetal, nonmetal
E)  nonmetal, metalloid

Question 6

Potassium forms an ion with a charge of ________.

Accepted Answer

A)  2+
B)  1-
C)  1+
D)  2-
E)  0

Question 7

A certain mass of carbon reacts with 128 g of oxygen to form carbon monoxide. ________ grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions.

Accepted Answer

A)  25.6
B)  64.0
C)  128
D)  1280
E)  256

Question 8

Which pair of elements is most apt to form an ionic compound with each other?

Accepted Answer

A)  barium, bromine
B)  calcium, sodium
C)  oxygen, fluorine
D)  sulfur, fluorine
E)  nitrogen, hydrogen

Question 9

Fluorine forms an ion with a charge of ________.

Accepted Answer

A)  1-
B)  1+
C)  2+
D)  3+
E)  3-

Question 10

Which one of the following basic forces is so small that it has no chemical significance?

Accepted Answer

A)  weak nuclear force
B)  strong nuclear force
C)  electromagnetism
D)  gravity
E)  Coulomb's law

Question 11

There are ________ protons, ________ neutrons, and ________ electrons in +5. A) 146, 92, 92 B) 92, 146, 87 C) 92, 146, 92 D) 92, 92, 87 E) 146, 92, 146" class="answers-bank-image d-inline" rel="preload" > U+5.

Accepted Answer

A)  146, 92, 92
B)  92, 146, 87
C)  92, 146, 92
D)  92, 92, 87
E)  146, 92, 146

Question 12

The element ________ is the most similar to sodium in chemical and physical properties.

Accepted Answer

A)  Mg
B)  Br
C)  N
D)  K
E)  Sr

Question 13

The proper formula for the hydronium ion is ________.

Accepted Answer

A)  H-
B)  OH-
C)  N3-
D)  H3O+
E)  NH4+

Question 14

The mass number of an atom of 14C is ________.

Accepted Answer

A)  6
B)  20
C)  8
D)  14
E)  10

Question 15

The correct name for HClO3 is ________.

Accepted Answer

A)  hydrochloric acid
B)  perchloric acid
C)  chloric acid
D)  chlorous acid
E)  hydrochlorous acid

Question 16

The correct name for H2SO3 is ________.

Accepted Answer

A)  sulfuric acid
B)  sulfurous acid
C)  hydrosulfuric acid
D)  hydrosulfic acid
E)  sulfur hydroxide

Question 17

Which metal forms cations of differing charges?

Accepted Answer

A)  K
B)  Cs
C)  Ba
D)  Al
E)  Sn

Question 18

The correct name for HNO2 is ________.

Accepted Answer

A)  nitrous acid
B)  nitric acid
C)  hydrogen nitrate
D)  hyponitrous acid
E)  pernitric acid

Question 19

How many protons are there in one atom of 71Ga?

Accepted Answer

A)  40
B)  70
C)  71
D)  31
E)  13

Question 20

The elements in groups 1A, 6A, and 7A are called ________, respectively.

Accepted Answer

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

Exam 2: Atoms, Molecules, and Ions

A certain mass of carbon reacts with 128 g of oxygen to form carbon monoxide. ________ grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions.

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The correct name for H2SO3 is ________.

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The elements in groups 1A, 6A, and 7A are called ________, respectively.

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How many protons are there in one atom of 71Ga?

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Vanadium has two naturally occurring isotopes, 50V with an atomic mass of 49.9472 amu and 51V with an atomic mass of 50.9440. The atomic weight of vanadium is 50.9415. The percent abundances of the vanadium isotopes are ________% 50V and ________% 51V.

Correct AnswerverifiedShow Answer

The correct name for HClO3 is ________.

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Oxygen is a ________ and nitrogen is a ________.

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Magnesium and sulfur form an ionic compound with the formula ________.

Correct AnswerverifiedShow Answer

Which metal forms cations of differing charges?

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Fluorine forms an ion with a charge of ________.

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The element ________ is the most similar to sodium in chemical and physical properties.

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Which pair of elements is most apt to form an ionic compound with each other?

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The correct name for HNO2 is ________.

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There are ________ protons, ________ neutrons, and ________ electrons in U+5.

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The correct name for Al2O3 is ________.

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Which one of the following basic forces is so small that it has no chemical significance?

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The mass number of an atom of 14C is ________.

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Potassium forms an ion with a charge of ________.

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The proper formula for the hydronium ion is ________.

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Sulfur forms an ion with a charge of ________.

Correct AnswerverifiedShow Answer

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The correct name for H₂SO₃ is ________.

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How many protons are there in one atom of ⁷¹Ga?

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Vanadium has two naturally occurring isotopes, ⁵⁰V with an atomic mass of 49.9472 amu and⁵¹V with an atomic mass of 50.9440. The atomic weight of vanadium is 50.9415. The percent abundances of the vanadium isotopes are % ⁵⁰V and % ⁵¹V.

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The correct name for HClO₃ is ________.

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Oxygen is a and nitrogen is a .

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The correct name for HNO₂ is ________.

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There are protons, neutrons, and electrons in U⁺⁵.

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The correct name for Al₂O₃ is ________.

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The mass number of an atom of ¹⁴_{C is ________.}

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