Question 1

When calcium reacts with sulfur the compound formed is ________.

Accepted Answer

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

Question 2

An unknown element is found to have three naturally occurring isotopes with atomic masses of     and   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. 
A) Ar 
B) K 
C) Cl 
D) Ca 
E) None of the above could be the unknown element.

Question 3

Which combination of protons,neutrons,and electrons is correct for the isotope of copper,

Accepted Answer

A) 29 p+, 34 n°, 29 e- 
B) 29 p+, 29 n°, 63 e- 
C) 63 p+, 29 n°, 63 e- 
D) 34 p+, 29 n°, 34 e- 
E) 34 p+, 34 n°, 29 e- 
A) 29 p+, 34 n°, 29 e- 
B) 29 p+, 29 n°, 63 e- 
C) 63 p+, 29 n°, 63 e- 
D) 34 p+, 29 n°, 34 e- 
E) 34 p+, 34 n°, 29 e-

Question 4

87 pm is the same as ________ Angstroms.

Accepted Answer

A) 870 
B) 8.7 
C) 87 
D) .87 
E) .087 
A) 870 
B) 8.7 
C) 87 
D) .87 
E) .087

Question 5

Which pair of atoms constitutes a pair of isotopes of the same element?

Accepted Answer

A)    X   X 
B)    X   X 
C)    X   X 
D)    X   X 
E)    X   X 
A)    X   X 
B)    X   X 
C)    X   X 
D)    X   X 
E)    X   X

Question 6

Potassium forms an ion with a charge of ________.

Accepted Answer

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

Question 7

Which one of the following polyatomic ions has the same charge as the hydroxide ion?

Accepted Answer

A) ammonium 
B) carbonate 
C) nitrate 
D) sulfate 
E) phosphate 
A) ammonium 
B) carbonate 
C) nitrate 
D) sulfate 
E) phosphate

Question 8

The formula for a salt is XBr.The X-ion in this salt has 46 electrons.The metal X is ________.

Accepted Answer

A) Ag 
B) Pd 
C) Cd 
D) Cu 
E) Cs 
A) Ag 
B) Pd 
C) Cd 
D) Cu 
E) Cs

Question 9

Which species has 16 protons?

Accepted Answer

A)    P 
B)      
C)    Cl 
D)    B   
E)    O 
A)    P 
B)      
C)    Cl 
D)    B   
E)    O

Question 10

The correct name for CaO is ________.

Accepted Answer

A) calcium oxide 
B) calcium hydroxide 
C) calcium peroxide 
D) calcium monoxide 
E) calcium dioxide 
A) calcium oxide 
B) calcium hydroxide 
C) calcium peroxide 
D) calcium monoxide 
E) calcium dioxide

Question 11

Cathode rays are deflected away from a negatively charged plate because ________.

Accepted Answer

A) they are not particles 
B) they are positively charged particles 
C) they are neutral particles 
D) they are negatively charged particles 
E) they are emitted by all matter 
A) they are not particles 
B) they are positively charged particles 
C) they are neutral particles 
D) they are negatively charged particles 
E) they are emitted by all matter

Question 12

If a iron atom loses 2 electrons to make an ion,what is the charge on that ion?

Accepted Answer

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

Question 13

Element X has three 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) 41.54 
B) 39.68 
C) 39.07 
D) 38.64 
E) 33.33 
A) 41.54 
B) 39.68 
C) 39.07 
D) 38.64 
E) 33.33

Question 14

There are ________ protons,________ neutrons,and ________ electrons in 131I-.

Accepted Answer

A) 131, 53, 54 
B) 131, 53, 52 
C) 53, 78, 54 
D) 53, 131, 52 
E) 53, 78, 52 
A) 131, 53, 54 
B) 131, 53, 52 
C) 53, 78, 54 
D) 53, 131, 52 
E) 53, 78, 52

Question 15

The name of PCl3 is ________.

Accepted Answer

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

Question 16

Which of the following atoms has the smallest number of neutrons?

Accepted Answer

A) carbon-14 
B) chlorine-35 
C) carbon-12 
D) carbon-13 
E) bromine-79 
A) carbon-14 
B) chlorine-35 
C) carbon-12 
D) carbon-13 
E) bromine-79

Question 17

How many total electrons are in the O2- ion?

Accepted Answer

A) 10 
B) 8 
C) 6 
D) 16 
E) 4 
A) 10 
B) 8 
C) 6 
D) 16 
E) 4

Question 18

Which species contains 68 neutrons?

Accepted Answer

A)    Sn+2 
B)    Sn+2 
C)    Cd+2 
D)    Ga 
E)    Ti 
A)    Sn+2 
B)    Sn+2 
C)    Cd+2 
D)    Ga 
E)    Ti

Question 19

Of the three types of radioactivity characterized by Rutherford,which is/are electrically charged?

Accepted Answer

A) β-rays 
B) α-rays and β-rays 
C) α-rays, β-rays, and γ-rays 
D) α-rays 
E) α-rays and γ-rays 
A) β-rays 
B) α-rays and β-rays 
C) α-rays, β-rays, and γ-rays 
D) α-rays 
E) α-rays and γ-rays

Question 20

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

Accepted Answer

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

Exam 2: Atoms, molecules, and Ions

When calcium reacts with sulfur the compound formed is ________.

An unknown element is found to have three naturally occurring isotopes with atomic masses of and Which of the following is the unknown element?

Which combination of protons,neutrons,and electrons is correct for the isotope of copper,

87 pm is the same as ________ Angstroms.

Which pair of atoms constitutes a pair of isotopes of the same element?

Potassium forms an ion with a charge of ________.

Which one of the following polyatomic ions has the same charge as the hydroxide ion?

The formula for a salt is XBr.The X-ion in this salt has 46 electrons.The metal X is ________.

Which species has 16 protons?

The correct name for CaO is ________.

Cathode rays are deflected away from a negatively charged plate because ________.

If a iron atom loses 2 electrons to make an ion,what is the charge on that ion?

Element X has three 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.

There are ________ protons,________ neutrons,and ________ electrons in 131I-.

The name of PCl3 is ________.

Which of the following atoms has the smallest number of neutrons?

How many total electrons are in the O2- ion?

Which species contains 68 neutrons?

Of the three types of radioactivity characterized by Rutherford,which is/are electrically charged?

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

Introduction: Matter, energy, and Measurement

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

There are protons, neutrons,and electrons in ¹³¹I^-.

The name of PCl₃ is ________.

How many total electrons are in the O^2- ion?