Question 1

Using periodic trends,place the following bonds in order of increasing ionic character. S-I Se-I O-I

Accepted Answer

A)  Se-I < S-I < O-I 
B)  S-I < Se-I < O-I 
C)  O-I < Se-I < S-I 
D)  Se-I < O-I < S-I 
E)  O-I < S-I < Se-I 
A)  Se-I < S-I < O-I 
B)  S-I < Se-I < O-I 
C)  O-I < Se-I < S-I 
D)  Se-I < O-I < S-I 
E)  O-I < S-I < Se-I

Question 2

The bond angle in NH3 is

Accepted Answer

A)  107° 
B)  104.5° 
C)  120° 
D)  109.5° 
E)  95° 
A)  107° 
B)  104.5° 
C)  120° 
D)  109.5° 
E)  95°

Question 3

Define formal charge.

Accepted Answer

Formal charge is the charge of

Question 4

Determine the electron geometry (eg)and molecular geometry (mg)of CO32⁻.

Accepted Answer

A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = tetrahedral, mg = trigonal pyramidal 
C)  eg = trigonal planar, mg = bent 
D)  eg = trigonal planar, mg = trigonal planar 
E)  eg = tetrahedral, mg = trigonal planar 
A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = tetrahedral, mg = trigonal pyramidal 
C)  eg = trigonal planar, mg = bent 
D)  eg = trigonal planar, mg = trigonal planar 
E)  eg = tetrahedral, mg = trigonal planar

Question 5

The electronegativity is 2.1 for H and 1.9 for Sb.Based on these electronegativities SbH3 would be expected to

Accepted Answer

A)  be ionic and contain H- ions. 
B)  be ionic and contain H+ ions. 
C)  have polar covalent bonds with a partial negative charges on the H atoms. 
D)  have polar covalent bonds with a partial positive charges on the H atoms. 
E)  have nonpolar bonds 
A)  be ionic and contain H- ions. 
B)  be ionic and contain H+ ions. 
C)  have polar covalent bonds with a partial negative charges on the H atoms. 
D)  have polar covalent bonds with a partial positive charges on the H atoms. 
E)  have nonpolar bonds

Question 6

How many of the following elements can form compounds with an expanded octet?
S Kr Xe B

Accepted Answer

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

Question 7

List the least electronegative atom.

Accepted Answer

The answer of List the least electronegative atom....

Question 8

Identify the number of electron groups around a molecule with a trigonal bipyramidal shape.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 9

Determine the electron geometry (eg)and molecular geometry (mg)of CH3+1.

Accepted Answer

A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = tetrahedral, mg = trigonal pyramidal 
C)  eg = trigonal planar, mg = bent 
D)  eg = trigonal planar, mg = trigonal planar 
E)  eg = tetrahedral, mg = trigonal planar 
A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = tetrahedral, mg = trigonal pyramidal 
C)  eg = trigonal planar, mg = bent 
D)  eg = trigonal planar, mg = trigonal planar 
E)  eg = tetrahedral, mg = trigonal planar

Question 10

Identify the compound with the highest percent ionic character.

Accepted Answer

A)  HF 
B)  IBr 
C)  HCl 
D)  LiF 
A)  HF 
B)  IBr 
C)  HCl 
D)  LiF

Question 11

Which of the following contains an atom that does NOT obey the octet rule?

Accepted Answer

A)  NaCl 
B)  SiO2 
C)  BrF3 
D)  BrF 
A)  NaCl 
B)  SiO2 
C)  BrF3 
D)  BrF

Question 12

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom H2CO.

Accepted Answer

A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = trigonal planar, eg = trigonal planar 
C)  eg = tetrahedral, mg = bent 
D)  eg = trigonal bipyramidal, mg = tetrahedral 
E)  eg = octahedral, mg = square planar 
A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = trigonal planar, eg = trigonal planar 
C)  eg = tetrahedral, mg = bent 
D)  eg = trigonal bipyramidal, mg = tetrahedral 
E)  eg = octahedral, mg = square planar

Question 13

The bromine atom in Br2 would be expected to have a

Accepted Answer

A)  charge of 1-. 
B)  partial charge δ-. 
C)  partial charge δ+. 
D)  charge of 0. 
A)  charge of 1-. 
B)  partial charge δ-. 
C)  partial charge δ+. 
D)  charge of 0.

Question 14

Which of the following elements can form compounds with an expanded octet?

Accepted Answer

A)  N 
B)  I 
C)  F 
D)  Be 
E)  None of the above can form compounds with an expanded octet. 
A)  N 
B)  I 
C)  F 
D)  Be 
E)  None of the above can form compounds with an expanded octet.

Question 15

Give the number of valence electrons for SO42-.

Accepted Answer

A)  32 
B)  30 
C)  34 
D)  28 
E)  36 
A)  32 
B)  30 
C)  34 
D)  28 
E)  36

Question 16

In the best Lewis structure for BeCl2 ,what is the formal charge on the Be atom?

Accepted Answer

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

Question 17

Draw the best Lewis structure for BrO4⁻ and determine the formal charge on bromine.

Accepted Answer

A)  -1 
B)  +1 
C)  0 
D)  +2 
E)  +3 
A)  -1 
B)  +1 
C)  0 
D)  +2 
E)  +3

Question 18

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule. PF3 OF2 PF4⁺

Accepted Answer

A)  PF3 2 4⁺ 
B)  OF2 3 4⁺ 
C)  OF2 4⁺ 3 
D)  PF4⁺ 2 3 
E)  PF4⁺ 3 2 
A)  PF3 2 4⁺ 
B)  OF2 3 4⁺ 
C)  OF2 4⁺ 3 
D)  PF4⁺ 2 3 
E)  PF4⁺ 3 2

Question 19

How many of the following molecules are polar?
BrCl3 CS2 SiF4 SO3

Accepted Answer

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

Question 20

Choose the bond below that is MOST polar.

Accepted Answer

A)  H-I 
B)  H-Br 
C)  H-F 
D)  H-Cl 
E)  C-H 
A)  H-I 
B)  H-Br 
C)  H-F 
D)  H-Cl 
E)  C-H

Exam 6: Chemical Bonding I

Using periodic trends,place the following bonds in order of increasing ionic character. S-I Se-I O-I

The bond angle in NH3 is

Define formal charge.

Determine the electron geometry (eg)and molecular geometry (mg)of CO32⁻.

The electronegativity is 2.1 for H and 1.9 for Sb.Based on these electronegativities SbH3 would be expected to

How many of the following elements can form compounds with an expanded octet? S Kr Xe B

List the least electronegative atom.

Identify the number of electron groups around a molecule with a trigonal bipyramidal shape.

Determine the electron geometry (eg)and molecular geometry (mg)of CH3+1.

Identify the compound with the highest percent ionic character.

Which of the following contains an atom that does NOT obey the octet rule?

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom H2CO.

The bromine atom in Br2 would be expected to have a

Which of the following elements can form compounds with an expanded octet?

Give the number of valence electrons for SO42-.

In the best Lewis structure for BeCl2 ,what is the formal charge on the Be atom?

Draw the best Lewis structure for BrO4⁻ and determine the formal charge on bromine.

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule. PF3 OF2 PF4⁺

How many of the following molecules are polar? BrCl3 CS2 SiF4 SO3

Choose the bond below that is MOST polar.

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

The bond angle in NH₃ is

Determine the electron geometry (eg)and molecular geometry (mg)of CO₃²⁻.

The electronegativity is 2.1 for H and 1.9 for Sb.Based on these electronegativities SbH₃ would be expected to

Determine the electron geometry (eg)and molecular geometry (mg)of CH₃⁺¹.

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom H₂CO.

The bromine atom in Br₂ would be expected to have a

Give the number of valence electrons for SO₄^2-.

In the best Lewis structure for BeCl₂,what is the formal charge on the Be atom?

Draw the best Lewis structure for BrO₄⁻ and determine the formal charge on bromine.

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule. PF₃ OF₂ PF₄⁺

How many of the following molecules are polar? BrCl₃ CS₂ SiF₄ SO₃