Question 1

Given the electronegativities below, which covalent single bond is most polar? Element: H C N O
Electronegativity: 2.1 2.5 3.0 3.5

Accepted Answer

A) C-H 
B) N-H 
C) O-H 
D) O-C 
E) O-N 
A) C-H 
B) N-H 
C) O-H 
D) O-C 
E) O-N

Question 2

In the Lewis symbol for a nitrogen atom, there are ________ paired and ________ unpaired electrons.

Accepted Answer

A) two, three 
B) one, three 
C) three, two 
D) zero, five 
E) two, two 
A) two, three 
B) one, three 
C) three, two 
D) zero, five 
E) two, two

Question 3

The ion PO43- has ________ valence electrons.

Accepted Answer

A) 14 
B) 24 
C) 27 
D) 29 
E) 32 
A) 14 
B) 24 
C) 27 
D) 29 
E) 32

Question 4

Why don't we draw double bonds between the Be atom and the Cl atoms in BeCl2?

Accepted Answer

A) That would give positive formal charges to the chlorine atoms and a negative formal charge to the beryllium atom. 
B) There aren't enough electrons. 
C) That would result in more than eight electrons around beryllium. 
D) That would result in more than eight electrons around each chlorine atom. 
E) That would result in the formal charges not adding up to zero. 
A) That would give positive formal charges to the chlorine atoms and a negative formal charge to the beryllium atom. 
B) There aren't enough electrons. 
C) That would result in more than eight electrons around beryllium. 
D) That would result in more than eight electrons around each chlorine atom. 
E) That would result in the formal charges not adding up to zero.

Question 5

The oxidation number of iron in Fe2O3 is ________.

Accepted Answer

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

Question 6

Which atom can accommodate an octet of electrons, but doesn't necessarily have to accommodate an octet?

Accepted Answer

A) N 
B) C 
C) H 
D) O 
E) B 
A) N 
B) C 
C) H 
D) O 
E) B

Question 7

A ________ covalent bond between the same two atoms is the longest.

Accepted Answer

A) single 
B) double 
C) triple 
D) strong 
E) They are all the same length. 
A) single 
B) double 
C) triple 
D) strong 
E) They are all the same length.

Question 8

The ________ ion has a noble gas electron configuration.

Accepted Answer

A) Be2+ 
B) Li2+ 
C) Li 
D) Mg2- 
E) Al2+ 
A) Be2+ 
B) Li2+ 
C) Li 
D) Mg2- 
E) Al2+

Question 9

The greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii.

Accepted Answer

A) True 
 B)False

Question 10

Most explosives are compounds that decompose rapidly to produce ________ products and a great deal of ________.

Accepted Answer

A) gaseous, gases 
B) liquid, heat 
C) soluble, heat 
D) solid, gas 
E) gaseous, heat 
A) gaseous, gases 
B) liquid, heat 
C) soluble, heat 
D) solid, gas 
E) gaseous, heat

Question 11

Ru+ ions are represented by the electron configuration ________.

Accepted Answer

A) [Kr]5s14d6 
B) [Kr]5s24d5 
C) [Kr]5s24d7 
D) [Kr]4d5 
E) [Ar]4s13d6 
A) [Kr]5s14d6 
B) [Kr]5s24d5 
C) [Kr]5s24d7 
D) [Kr]4d5 
E) [Ar]4s13d6

Question 12

The formula of palladium (IV)sulfide is ________.

Accepted Answer

A) Pd2S4 
B) PdS4 
C) Pd4S 
D) PdS2 
E) Pd2S2 
A) Pd2S4 
B) PdS4 
C) Pd4S 
D) PdS2 
E) Pd2S2

Question 13

A valid Lewis structure of ________ cannot be drawn without violating the octet rule.

Accepted Answer

A) NI3 
B) SO2 
C) ICl5 
D) SiF4 
E) CO2 
A) NI3 
B) SO2 
C) ICl5 
D) SiF4 
E) CO2

Question 14

A valid Lewis structure of ________ cannot be drawn without violating the octet rule.

Accepted Answer

A) PO43- 
B) SiF4 
C) CF4 
D) SeF4 
E) NF3 
A) PO43- 
B) SiF4 
C) CF4 
D) SeF4 
E) NF3

Question 15

Polyatomic ions with an odd number of electrons will ________ the octet rule.

Accepted Answer

The answer of Polyatomic ions with an odd number of...

Question 16

Based on the octet rule, iodine most likely forms an ________ ion.

Accepted Answer

A) I2+ 
B) I4+ 
C) I4- 
D) I+ 
E) I- 
A) I2+ 
B) I4+ 
C) I4- 
D) I+ 
E) I-

Question 17

A valid Lewis structure of ________ cannot be drawn without violating the octet rule.

Accepted Answer

A) NF3 
B) IF3 
C) PF3 
D) SbF3 
E) SO42- 
A) NF3 
B) IF3 
C) PF3 
D) SbF3 
E) SO42-

Question 18

Lattice energy is ________.

Accepted Answer

A) the energy required to convert a mole of ionic solid into its constituent ions in the gas phase 
B) the energy given off when gaseous ions combine to form one mole of an ionic solid 
C) the energy required to produce one mole of an ionic compound from its constituent elements in their standard states 
D) the sum of ionization energies of the components in an ionic solid 
E) the sum of electron affinities of the components in an ionic solid 
A) the energy required to convert a mole of ionic solid into its constituent ions in the gas phase 
B) the energy given off when gaseous ions combine to form one mole of an ionic solid 
C) the energy required to produce one mole of an ionic compound from its constituent elements in their standard states 
D) the sum of ionization energies of the components in an ionic solid 
E) the sum of electron affinities of the components in an ionic solid

Question 19

The ________ ion has a noble gas electron configuration.

Accepted Answer

A) Cl- 
B) F2- 
C) F 
D) S2+ 
E) O- 
A) Cl- 
B) F2- 
C) F 
D) S2+ 
E) O-

Question 20

To convert from one resonance structure to another, ________.

Accepted Answer

A) only atoms can be moved 
B) electrons and atoms can both be moved 
C) only electrons can be moved 
D) neither electrons nor atoms can be moved 
E) electrons must be added 
A) only atoms can be moved 
B) electrons and atoms can both be moved 
C) only electrons can be moved 
D) neither electrons nor atoms can be moved 
E) electrons must be added

Exam 8: Basic Concepts of Chemical Bonding

Given the electronegativities below, which covalent single bond is most polar? Element: H C N O Electronegativity: 2.1 2.5 3.0 3.5

In the Lewis symbol for a nitrogen atom, there are ________ paired and ________ unpaired electrons.

The ion PO43- has ________ valence electrons.

Why don't we draw double bonds between the Be atom and the Cl atoms in BeCl2?

The oxidation number of iron in Fe2O3 is ________.

Which atom can accommodate an octet of electrons, but doesn't necessarily have to accommodate an octet?

A ________ covalent bond between the same two atoms is the longest.

The ________ ion has a noble gas electron configuration.

The greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii.

Most explosives are compounds that decompose rapidly to produce ________ products and a great deal of ________.

Ru+ ions are represented by the electron configuration ________.

The formula of palladium (IV)sulfide is ________.

A valid Lewis structure of ________ cannot be drawn without violating the octet rule.

A valid Lewis structure of ________ cannot be drawn without violating the octet rule.

Polyatomic ions with an odd number of electrons will ________ the octet rule.

Based on the octet rule, iodine most likely forms an ________ ion.

A valid Lewis structure of ________ cannot be drawn without violating the octet rule.

Lattice energy is ________.

The ________ ion has a noble gas electron configuration.

To convert from one resonance structure to another, ________.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

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

In the Lewis symbol for a nitrogen atom, there are paired and unpaired electrons.

The ion PO₄^3-has ________ valence electrons.

Why don't we draw double bonds between the Be atom and the Cl atoms in BeCl₂?

The oxidation number of iron in Fe₂O₃ is ________.

Most explosives are compounds that decompose rapidly to produce products and a great deal of .

Ru⁺ ions are represented by the electron configuration ________.