Question 1

Which of these is an isoelectronic series?

Accepted Answer

A) Na+,K+,Rb+,Cs+ 
B) K+,Ca2+,Ar,S2- 
C) Na+,Mg2+,S2-,Cl- 
D) Li,Be,B,C 
E) none of these (A-
D)  
A) Na+,K+,Rb+,Cs+ 
B) K+,Ca2+,Ar,S2- 
C) Na+,Mg2+,S2-,Cl- 
D) Li,Be,B,C 
E) none of these (A-
D)

Question 2

In the Lewis structure for SF6,the central sulfur atom shares __________ electrons.

Accepted Answer

A) 4 
B) 8 
C) 10 
D) 12 
E) None of the above,because SF6 is an ionic compound. 
A) 4 
B) 8 
C) 10 
D) 12 
E) None of the above,because SF6 is an ionic compound.

Question 3

The molecular structure of NCl3 is

Accepted Answer

A) pyramidal 
B) none of these 
C) octahedral 
D) trigonal planar 
E) bent 
A) pyramidal 
B) none of these 
C) octahedral 
D) trigonal planar 
E) bent

Question 4

How many resonance structures can be drawn for the molecule O3?

Accepted Answer

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

Question 5

Select the molecule from the following that has a dipole moment.

Accepted Answer

A) CO2 
B) SeO3 
C) XeF4 
D) SF4 
E) BeCl2 
A) CO2 
B) SeO3 
C) XeF4 
D) SF4 
E) BeCl2

Question 6

The size in a series of isoelectronic ions increases as the nuclear charge increases.

Accepted Answer

A) True 
 B)False

Question 7

How many of the following molecules possess dipole moments? BH3,CH4,PCl5,H2O,HF,H2

Accepted Answer

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

Question 8

Match the ions below with the pictures that represent their relative sizes.Justify your answers.
Ions:
Se2- K+ Ga3+ Br-  Ca2+

Accepted Answer

@#IMG-DLM& K⁺ Ca²⁺ Ga³⁺Se²^-Br^- Se²^- and Br^- each have the ele

Question 9

The shape of an ammonia molecule is tetrahedral.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following Lewis structures best describes BF3?

Accepted Answer

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

Question 11

Of the following,which molecule has the largest bond angle?

Accepted Answer

A) O3 
B) OF2 
C) HCN 
D) H2O 
E) More than one of the above have equally large bond angles. 
A) O3 
B) OF2 
C) HCN 
D) H2O 
E) More than one of the above have equally large bond angles.

Question 12

A nonpolar covalent bond results from the unequal sharing of a pair of electrons between atoms in a molecule.

Accepted Answer

A) True 
 B)False

Question 13

Which has the greater N-O bond length,NO2- or NO3-?

Accepted Answer

A) NO2- 
B) NO3- 
C) The bond lengths are the same. 
D) More information is needed. 
E) None of these (A-
D) . 
A) NO2- 
B) NO3- 
C) The bond lengths are the same. 
D) More information is needed. 
E) None of these (A-
D) .

Question 14

The bond angle in H2Se is about:

Accepted Answer

A) 120° 
B) 60° 
C) 180° 
D) 109° 
E) 90° 
A) 120° 
B) 60° 
C) 180° 
D) 109° 
E) 90°

Question 15

Choose the molecule with the strongest bond.

Accepted Answer

A) CH4 
B) H2O 
C) NH3 
D) HF 
E) All are equal 
A) CH4 
B) H2O 
C) NH3 
D) HF 
E) All are equal

Question 16

In the molecule XeF2,how many pairs of electrons surround Xe and what is the molecular geometry?

Accepted Answer

A) 4,bent 
B) 4,pyramidal 
C) 5,linear 
D) 5,bent 
E) 6,linear 
A) 4,bent 
B) 4,pyramidal 
C) 5,linear 
D) 5,bent 
E) 6,linear

Question 17

The Lewis structure for H3BO3 is

Accepted Answer

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

Question 18

Which ion is planar?

Accepted Answer

A) NH4+ 
B) CO32- 
C) SO32- 
D) ClO3- 
E) all are planar 
A) NH4+ 
B) CO32- 
C) SO32- 
D) ClO3- 
E) all are planar

Question 19

For each of the following compounds:
a)Draw the Lewis structure.
b)Give the shape of the molecule.
c)Indicate the polarity of the molecule.
-AlF3

Accepted Answer

Part A: @#IMG-DLM& P

Question 20

Which of the following has an incomplete octet in its Lewis structure?

Accepted Answer

A) SO2 
B) ICl 
C) CO2 
D) F2 
E) NO 
A) SO2 
B) ICl 
C) CO2 
D) F2 
E) NO

Exam 8: Bonding: General Concepts

Which of these is an isoelectronic series?

In the Lewis structure for SF6,the central sulfur atom shares __________ electrons.

The molecular structure of NCl3 is

How many resonance structures can be drawn for the molecule O3?

Select the molecule from the following that has a dipole moment.

The size in a series of isoelectronic ions increases as the nuclear charge increases.

How many of the following molecules possess dipole moments? BH3,CH4,PCl5,H2O,HF,H2

Match the ions below with the pictures that represent their relative sizes.Justify your answers. Ions: Se2- K+ Ga3+ Br- Ca2+

The shape of an ammonia molecule is tetrahedral.

Which of the following Lewis structures best describes BF3?

Of the following,which molecule has the largest bond angle?

A nonpolar covalent bond results from the unequal sharing of a pair of electrons between atoms in a molecule.

Which has the greater N-O bond length,NO2- or NO3-?

The bond angle in H2Se is about:

Choose the molecule with the strongest bond.

In the molecule XeF2,how many pairs of electrons surround Xe and what is the molecular geometry?

The Lewis structure for H3BO3 is

Which ion is planar?

For each of the following compounds: a)Draw the Lewis structure. b)Give the shape of the molecule. c)Indicate the polarity of the molecule. -AlF3

Which of the following has an incomplete octet in its Lewis structure?

Chemical Foundations

Atoms, molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Thermochemistry

Atomic Structure and Periodicity

Covalent Bonding: Orbitals

Liquids and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

Spontaneity, entropy, and Free Energy

Electrochemistry

The Nucleus: a Chemists View

The Representative Elements

Transition Metals and Coordination Chemistry

Organic and Biological Molecules

Filters

In the Lewis structure for SF₆,the central sulfur atom shares __________ electrons.

The molecular structure of NCl₃ is

How many resonance structures can be drawn for the molecule O₃?

How many of the following molecules possess dipole moments? BH₃,CH₄,PCl₅,H₂O,HF,H₂

Match the ions below with the pictures that represent their relative sizes.Justify your answers. Ions: Se²^- K⁺ Ga³⁺ Br^- Ca²⁺

Which of the following Lewis structures best describes BF₃?

Which has the greater N-O bond length,NO₂^- or NO₃^-?

The bond angle in H₂Se is about:

In the molecule XeF₂,how many pairs of electrons surround Xe and what is the molecular geometry?

The Lewis structure for H₃BO₃ is

For each of the following compounds: a)Draw the Lewis structure. b)Give the shape of the molecule. c)Indicate the polarity of the molecule. -AlF₃