Question 1

Which one of the following ionic solids would have the largest lattice energy?

Accepted Answer

A) NaCl 
B) NaF 
C) CaBr2 
D) CsI 
E) CaCl2 
A) NaCl 
B) NaF 
C) CaBr2 
D) CsI 
E) CaCl2

Question 2

The bond in F2 is described as polar covalent.

Accepted Answer

A) True 
 B)False

Question 3

The Lewis dot symbol for the calcium ion is

Accepted Answer

A)      2+ 
B) -Ca- 
C)      2+ 
D) Ca2+ 
E) Ca 
A)      2+ 
B) -Ca- 
C)      2+ 
D) Ca2+ 
E) Ca

Question 4

The total number of valence electrons in the ion SO42- is

Accepted Answer

A) 24 
B) 26 
C) 28 
D) 30 
E) 32 
A) 24 
B) 26 
C) 28 
D) 30 
E) 32

Question 5

The number of lone electron pairs in the ClO4- ion is ___.

Accepted Answer

A) 3 
B) 4 
C) 6 
D) 12 
E) 24 
A) 3 
B) 4 
C) 6 
D) 12 
E) 24

Question 6

Arrange the elements F, P, and Cl in order of increasing electronegativity

Accepted Answer

A) F < P < Cl 
B) P < Cl < F 
C) Cl < P < F 
D) P < F < Cl 
E) Cl < F < P 
A) F < P < Cl 
B) P < Cl < F 
C) Cl < P < F 
D) P < F < Cl 
E) Cl < F < P

Question 7

Which of the elements listed below would most likely form a nonpolar covalent bond when bonded to bromine?

Accepted Answer

A) Rb 
B) Br 
C) C 
D) O 
E) H 
A) Rb 
B) Br 
C) C 
D) O 
E) H

Question 8

What is the formal charge on the singly bonded oxygens in the Lewis structure for the carbonate ion?

Accepted Answer

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

Question 9

The total number of valence electrons in the molecule P2O5 is

Accepted Answer

A) 11 
B) 22 
C) 23 
D) 40 
E) 70 
A) 11 
B) 22 
C) 23 
D) 40 
E) 70

Question 10

A polar covalent bond would form in which one of the following pairs of atoms?

Accepted Answer

A) Cl - Cl 
B) Si - Si 
C) Ca - Cl 
D) Cr - Br 
E) P - Cl 
A) Cl - Cl 
B) Si - Si 
C) Ca - Cl 
D) Cr - Br 
E) P - Cl

Question 11

Estimate the enthalpy change for the reaction 2CO + O2 $\rarr$2CO2 given the following bond energies. BE(C$\equiv$O)= 1074 kJ/mol
BE(O=O)= 499 kJ/mol
BE(C=O)= 802 kJ/mol

Accepted Answer

A) +2380 kJ/mol 
B) +1949 kJ/mol 
C) +744 kJ/mol 
D) -561 kJ/mol 
E) -744 kJ/mol 
A) +2380 kJ/mol 
B) +1949 kJ/mol 
C) +744 kJ/mol 
D) -561 kJ/mol 
E) -744 kJ/mol

Question 12

Which of the following substances will display an incomplete octet in its Lewis structure?

Accepted Answer

A) CO2 
B) Cl2 
C) ICl 
D) NO 
E) SO2 
A) CO2 
B) Cl2 
C) ICl 
D) NO 
E) SO2

Question 13

Write a Lewis structure for the phosphate ion, PO43-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

Question 14

The Lewis structure reveals only single bonds in which of the following species?

Accepted Answer

A) CO2 
B) CO 
C) CO32- 
D) Cl2CO 
E) CCl4 
A) CO2 
B) CO 
C) CO32- 
D) Cl2CO 
E) CCl4

Question 15

What is the formal charge on the oxygen atom in N2O (the atomic order is N-N-O)?

Accepted Answer

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

Question 16

Classify the O - H bond in CH3OH as ionic, polar covalent, or nonpolar covalent.

Accepted Answer

A) ionic 
B) polar covalent 
C) nonpolar covalent 
A) ionic 
B) polar covalent 
C) nonpolar covalent

Question 17

The number of lone electron pairs in the NH4+ ion is ___.

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Exam 9: Chemical Bonding I: Basic Concepts

Which one of the following ionic solids would have the largest lattice energy?

The bond in F2 is described as polar covalent.

The Lewis dot symbol for the calcium ion is

The total number of valence electrons in the ion SO42- is

The number of lone electron pairs in the ClO4- ion is ___.

Arrange the elements F, P, and Cl in order of increasing electronegativity

Which of the elements listed below would most likely form a nonpolar covalent bond when bonded to bromine?

What is the formal charge on the singly bonded oxygens in the Lewis structure for the carbonate ion?

The total number of valence electrons in the molecule P2O5 is

A polar covalent bond would form in which one of the following pairs of atoms?

Estimate the enthalpy change for the reaction 2CO + O2 →\rarr→ 2CO2 given the following bond energies. BE(C ≡\equiv≡ O)= 1074 kJ/mol BE(O=O)= 499 kJ/mol BE(C=O)= 802 kJ/mol

Which of the following substances will display an incomplete octet in its Lewis structure?

Write a Lewis structure for the phosphate ion, PO43-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

The Lewis structure reveals only single bonds in which of the following species?

What is the formal charge on the oxygen atom in N2O (the atomic order is N-N-O)?

Classify the O - H bond in CH3OH as ionic, polar covalent, or nonpolar covalent.

The number of lone electron pairs in the NH4+ ion is ___.

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

The bond in F₂ is described as polar covalent.

The total number of valence electrons in the ion SO₄^2- is

The number of lone electron pairs in the ClO₄^- ion is ___.

The total number of valence electrons in the molecule P₂O₅ is

Estimate the enthalpy change for the reaction 2CO + O₂ $\rarr$ 2CO₂ given the following bond energies. BE(C $\equiv$ O)= 1074 kJ/mol BE(O=O)= 499 kJ/mol BE(C=O)= 802 kJ/mol

Write a Lewis structure for the phosphate ion, PO₄^3-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

What is the formal charge on the oxygen atom in N₂O (the atomic order is N-N-O)?

Classify the O - H bond in CH₃OH as ionic, polar covalent, or nonpolar covalent.

The number of lone electron pairs in the NH₄⁺ ion is ___.