Question 1

In the symbol below, x = .
X C 6

Accepted Answer

A)   6
B)   7
C)   19
D)   13
E)   not enough information to determineF) None of the above
G) A) and E)

Question 2

Which element forms an ion with the same charge as the ammonium ion?

Accepted Answer

A)   nitrogen
B)   oxygen
C)   potassium
D)   chlorine
E)   calciumF) B) and E)
G) B) and D)

Question 3

Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ratio of 3:
1 by mass. In ethane, there are 24.0 g of carbon for every 6.00 g of hydrogen, a ratio of 4:
1 by mass. This is a statement of the law of _.

Accepted Answer

A)   multiple proportions
B)   conservation of matter
C)   octaves
D)   conservation of mass
E)   constant compositionF) None of the above
G) D) and E)

Question 4

Sulfur forms an ion with a charge of _ .

Accepted Answer

A)   - 2
B)   +2
C)   +3
D)   - 6
E)   +6F) A) and B)
G) D) and E)

Question 5

The element X has two naturally occurring isotopes. The 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)   34.02
B)   30.20
C)   35.22
D)   32.73
E)   33.19F) C) and D)
G) A) and C)

Question 6

An atom of the most common isotope of gold, 197Au, has protons, _ _ neutrons, and electrons.

Accepted Answer

A)   79, 118, 79
B)   79, 118, 118
C)   79, 197, 197
D)   197, 79, 118
E)   118, 79, 39F) A) and B)
G) A) and E)

Question 7

In the periodic table, the elements are arranged in .

Accepted Answer

A)   alphabetical order
B)   order of increasing neutron content
C)   reverse alphabetical order
D)   order of increasing metallic properties
E)   order of increasing atomic numberF) None of the above
G) A) and C)

Question 8

Which one of the following species has as many electrons as it has neutrons?

Accepted Answer

A)  . 14C
B)  . 40Ca2+ 
C)  . 1H
D)  . 14C2+ 
E)  . 19F-F) A) and B)
G) A) and C)

Question 9

Of the choices below, which one is not an ionic compound?

Accepted Answer

A)   PbCl2 
B)   PCl5 
C)   MoCl6 
D)   NaCl
E)   RbClF) B) and E)
G) A) and B)

Question 10

The most metallic halogen is astatine.

Accepted Answer

A) True 
 B)False

Question 11

Of the following, the smallest and lightest subatomic particle is the .

Accepted Answer

A)   electron
B)   proton
C)   nucleus
D)   alpha particle
E)   neutronF) A) and D)
G) A) and E)

Question 12

Which one of the following compounds is chromium(III)  oxide?

Accepted Answer

A)   Cr3O
B)   Cr2O4 
C)   Cr2O3 
D)   Cr3O2 
E)   CrO3F) None of the above
G) A) and B)

Question 13

The name of the ionic compound KBrO4 is _ .

Accepted Answer

A)   potassium perbromite
B)   potassium bromide
C)   potassium hypobromate
D)   potassium bromate
E)   potassium perbromateF) C) and D)
G) D) and E)

Question 14

Predict the empirical formula of the ionic compound that forms from magnesium and oxygen.

Accepted Answer

A)   MgO2 
B)   MgO
C)   Mg2O2 
D)   Mg3O2 
E)   Mg2OF) A) and E)
G) A) and B)

Question 15

The name of PCl3 is _ .

Accepted Answer

A)   trichloro potassium
B)   potassium chloride
C)   phosphorous(III)  chloride
D)   phosphorus trichloride
E)   monophosphorous trichlorideF) A) and B)
G) None of the above

Question 16

The charge on the manganese in the salt MnF3 is _ .

Accepted Answer

A)   - 2
B)   - 1
C)   +1
D)   +3
E)   +2F) None of the above
G) A) and D)

Question 17

Which species below is the nitrate ion?

Accepted Answer

A)   NH4+ 
B)   N3- 
C)   NO3- 
D)   NO2- 
E)   N3-F) D) and E)
G) B) and E)

Question 18

Which pair of elements below should be the most similar in chemical properties?

Accepted Answer

A)   I and Br
B)   Cs and He
C)   B and As
D)   C and O
E)   K and KrF) All of the above
G) A) and B)

Question 19

the possible oxication numbers for gold are 1+ and 2+.

Accepted Answer

A) True 
 B)False

Question 20

Consider the following selected postulates of Dalton's atomic theory:
i. Each element is composed of extremely small particles called atoms.
ii. Atoms are indivisible.
iii. Atoms of a given element are identical.
iv. Atoms of different elements are different and have different properties. Which of the postulates is(are) no longer valid?

Accepted Answer

A)   (iii)  and (iv) 
B)   (i)  and (ii) 
C)   (ii)  only
D)   (iii)  only
E)   (ii)  and (iii) F) B) and C)
G) A) and B)

Exam 2: Atoms, Molecules, and Ions

In the periodic table, the elements are arranged in .

Correct Answer
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The name of the ionic compound KBrO₄is _ .

Correct Answer
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Which pair of elements below should be the most similar in chemical properties?

Correct Answer
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The element X has two naturally occurring isotopes. The 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 charge on the manganese in the salt MnF₃is _ .

Correct Answer
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the possible oxication numbers for gold are 1+ and 2+.

Correct Answer
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In the symbol below, x = . X _C 6

Correct Answer
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Predict the empirical formula of the ionic compound that forms from magnesium and oxygen.

Correct Answer
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Which one of the following compounds is chromium(III) oxide?

Correct Answer
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Which one of the following species has as many electrons as it has neutrons?

Correct Answer
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Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ratio of 3: 1 by mass. In ethane, there are 24.0 g of carbon for every 6.00 g of hydrogen, a ratio of 4: 1 by mass. This is a statement of the law of _.

Correct Answer
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The name of PCl₃is _ .

Correct Answer
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Correct Answer
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Sulfur forms an ion with a charge of _ .

Correct Answer
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The most metallic halogen is astatine.

Correct Answer
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Which element forms an ion with the same charge as the ammonium ion?

Correct Answer
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Of the following, the smallest and lightest subatomic particle is the .

Correct Answer
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An atom of the most common isotope of gold, ¹⁹⁷Au, has protons, _ _ neutrons, and electrons.

Correct Answer
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Of the choices below, which one is not an ionic compound?

Correct Answer
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Which species below is the nitrate ion?

Correct Answer
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Exam 2: Atoms, Molecules, and Ions

In the periodic table, the elements are arranged in .

Correct AnswerverifiedShow Answer

The name of the ionic compound KBrO4 is _ .

Correct AnswerverifiedShow Answer

Which pair of elements below should be the most similar in chemical properties?

Correct AnswerverifiedShow Answer

The element X has two naturally occurring isotopes. The 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 charge on the manganese in the salt MnF3 is _ .

Correct AnswerverifiedShow Answer

the possible oxication numbers for gold are 1+ and 2+.

Correct AnswerverifiedShow Answer

In the symbol below, x = . X C 6

Correct AnswerverifiedShow Answer

Predict the empirical formula of the ionic compound that forms from magnesium and oxygen.

Correct AnswerverifiedShow Answer

Which one of the following compounds is chromium(III) oxide?

Correct AnswerverifiedShow Answer

Which one of the following species has as many electrons as it has neutrons?

Correct AnswerverifiedShow Answer

Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ratio of 3: 1 by mass. In ethane, there are 24.0 g of carbon for every 6.00 g of hydrogen, a ratio of 4: 1 by mass. This is a statement of the law of _.

Correct AnswerverifiedShow Answer

The name of PCl3 is _ .

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Sulfur forms an ion with a charge of _ .

Correct AnswerverifiedShow Answer

The most metallic halogen is astatine.

Correct AnswerverifiedShow Answer

Which element forms an ion with the same charge as the ammonium ion?

Correct AnswerverifiedShow Answer

Of the following, the smallest and lightest subatomic particle is the .

Correct AnswerverifiedShow Answer

An atom of the most common isotope of gold, 197Au, has protons, _ _ neutrons, and electrons.

Correct AnswerverifiedShow Answer

Of the choices below, which one is not an ionic compound?

Correct AnswerverifiedShow Answer

Which species below is the nitrate ion?

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The name of the ionic compound KBrO₄is _ .

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The charge on the manganese in the salt MnF₃is _ .

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In the symbol below, x = . X _C 6

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The name of PCl₃is _ .

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An atom of the most common isotope of gold, ¹⁹⁷Au, has protons, _ _ neutrons, and electrons.

Correct Answer
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Correct Answer
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