Question 1

The atomic mass unit is presently based on assigning an exact integral mass (in amu)to an isotope of ________.

Accepted Answer

A) hydrogen 
B) oxygen 
C) sodium 
D) carbon 
E) helium 
A) hydrogen 
B) oxygen 
C) sodium 
D) carbon 
E) helium

Question 2

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) 33.33 
B) 55.74 
C) 56.11 
D) 57.23 
E) 56.29 
A) 33.33 
B) 55.74 
C) 56.11 
D) 57.23 
E) 56.29

Question 3

The correct name for HClO2 is ________.

Accepted Answer

A) perchloric acid 
B) chloric acid 
C) hypochlorous acid 
D) hypychloric acid 
E) chlorous acid 
A) perchloric acid 
B) chloric acid 
C) hypochlorous acid 
D) hypychloric acid 
E) chlorous acid

Question 4

The charge on an electron was determined in the ________.

Accepted Answer

A) cathode ray tube, by J. J. Thomson 
B) Rutherford gold foil experiment 
C) Millikan oil drop experiment 
D) Dalton atomic theory 
E) atomic theory of matter 
A) cathode ray tube, by J. J. Thomson 
B) Rutherford gold foil experiment 
C) Millikan oil drop experiment 
D) Dalton atomic theory 
E) atomic theory of matter

Question 5

Of the following, only ________ is not a metalloid.

Accepted Answer

A) B 
B) Po 
C) Si 
D) Ge 
E) As 
A) B 
B) Po 
C) Si 
D) Ge 
E) As

Question 6

Which species has 18 electrons?

Accepted Answer

A) "39K" 
B) "32S2-" 
C) "35Cl" 
D) "27Al3+" 
E) "64Cu2+" 
A) "39K" 
B) "32S2-" 
C) "35Cl" 
D) "27Al3+" 
E) "64Cu2+"

Question 7

Which one of the following will occur as diatomic molecules in elemental form?

Accepted Answer

A) helium 
B) argon 
C) chlorine 
D) phosphorous 
E) sodium 
A) helium 
B) argon 
C) chlorine 
D) phosphorous 
E) sodium

Question 8

What is the molecular formula for propane?

Accepted Answer

A) C2H8 
B) C3H6 
C) C3H8 
D) C4H8 
E) C4H10 
A) C2H8 
B) C3H6 
C) C3H8 
D) C4H8 
E) C4H10

Question 9

Which pair of elements is most apt to form a molecular compound with each other?

Accepted Answer

A) aluminum, oxygen 
B) magnesium, iodine 
C) sulfur, fluorine 
D) potassium, lithium 
E) barium, bromine 
A) aluminum, oxygen 
B) magnesium, iodine 
C) sulfur, fluorine 
D) potassium, lithium 
E) barium, bromine

Question 10

Aluminum reacts with a certain nonmetallic element to form a compound with the general formula AlX. Element X is a diatomic gas at room temperature. Element X must be ________.

Accepted Answer

A) oxygen 
B) fluorine 
C) chlorine 
D) nitrogen 
E) sulfur 
A) oxygen 
B) fluorine 
C) chlorine 
D) nitrogen 
E) sulfur

Question 11

Element M reacts with fluorine to form an ionic compound with the formula MF3. The M-ion has 21 electrons. Element M is ________.

Accepted Answer

A) Al 
B) Cr 
C) Mn 
D) Fe 
E) Sc 
A) Al 
B) Cr 
C) Mn 
D) Fe 
E) Sc

Question 12

The correct name for HNO3 is ________.

Accepted Answer

A) nitrous acid 
B) nitric acid 
C) hydronitroxide acid 
D) nitroxide acid 
E) nitrogen hydroxide 
A) nitrous acid 
B) nitric acid 
C) hydronitroxide acid 
D) nitroxide acid 
E) nitrogen hydroxide

Question 13

What is the molecular formula for octane?

Accepted Answer

A) C4H10 
B) C5H10 
C) C6H14 
D) C14H28 
E) C8H18 
A) C4H10 
B) C5H10 
C) C6H14 
D) C14H28 
E) C8H18

Question 14

Aluminum forms an ion with a charge of ________.

Accepted Answer

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

Question 15

What is the molecular formula for butane?

Accepted Answer

A) C2H8 
B) C3H6 
C) C3H8 
D) C4H8 
E) C4H10 
A) C2H8 
B) C3H6 
C) C3H8 
D) C4H8 
E) C4H10

Question 16

Which one of the following is not one of the postulates of Dalton's atomic theory?

Accepted Answer

A) Atoms are composed of protons, neutrons, and electrons. 
B) All atoms of a given element are identical; the atoms of different elements are different and have different properties. 
C) Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions. 
D) Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms. 
E) Each element is composed of extremely small particles called atoms. 
A) Atoms are composed of protons, neutrons, and electrons. 
B) All atoms of a given element are identical; the atoms of different elements are different and have different properties. 
C) Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions. 
D) Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms. 
E) Each element is composed of extremely small particles called atoms.

Question 17

The formula of the chromate ion is ________.

Accepted Answer

A) CrO42- 
B) CrO23- 
C) CrO- 
D) CrO32- 
E) CrO2- 
A) CrO42- 
B) CrO23- 
C) CrO- 
D) CrO32- 
E) CrO2-

Question 18

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

Question 19

Of the three types of radioactivity characterized by Rutherford, which are particles?

Accepted Answer

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

Question 20

The formula for the compound formed between aluminum ions and phosphate ions is ________.

Accepted Answer

A) Al3(PO4)3 
B) AlPO4 
C) Al(PO4)3 
D) Al2(PO4)3 
E) AlP 
A) Al3(PO4)3 
B) AlPO4 
C) Al(PO4)3 
D) Al2(PO4)3 
E) AlP

Exam 2: Atoms, Molecules, and Ions

The atomic mass unit is presently based on assigning an exact integral mass (in amu)to an isotope of ________.

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.

The correct name for HClO2 is ________.

The charge on an electron was determined in the ________.

Of the following, only ________ is not a metalloid.

Which species has 18 electrons?

Which one of the following will occur as diatomic molecules in elemental form?

What is the molecular formula for propane?

Which pair of elements is most apt to form a molecular compound with each other?

Aluminum reacts with a certain nonmetallic element to form a compound with the general formula AlX. Element X is a diatomic gas at room temperature. Element X must be ________.

Element M reacts with fluorine to form an ionic compound with the formula MF3. The M-ion has 21 electrons. Element M is ________.

The correct name for HNO3 is ________.

What is the molecular formula for octane?

Aluminum forms an ion with a charge of ________.

What is the molecular formula for butane?

Which one of the following is not one of the postulates of Dalton's atomic theory?

The formula of the chromate ion is ________.

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

Of the three types of radioactivity characterized by Rutherford, which are particles?

The formula for the compound formed between aluminum ions and phosphate ions is ________.

Introduction: Matter and Measurement

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

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

The correct name for HClO₂ is ________.

Element M reacts with fluorine to form an ionic compound with the formula MF₃. The M-ion has 21 electrons. Element M is ________.

The correct name for HNO₃is ________.

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