Question 1

Which compound has 24 valence electrons?

Accepted Answer

A)  C3H6O 
B)  C2H6O 
C)  CO2 
D)  HCN 
A)  C3H6O 
B)  C2H6O 
C)  CO2 
D)  HCN A

Question 2

Which statement is CORRECT concerning the cyanide ion?

Accepted Answer

A)  The carbon atom has a tetrahedral geometry,and the nitrogen atom has a liner geometry. 
B)  The carbon atom has a trigonal planar geometry,and the nitrogen atom has a liner geometry. 
C)  Both atoms have a linear geometry. 
D)  Both atoms have a trigonal planar geometry. 
A)  The carbon atom has a tetrahedral geometry,and the nitrogen atom has a liner geometry. 
B)  The carbon atom has a trigonal planar geometry,and the nitrogen atom has a liner geometry. 
C)  Both atoms have a linear geometry. 
D)  Both atoms have a trigonal planar geometry. C

Question 3

What is the formal charge on the nitrogen atom in this structure?

Accepted Answer

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

Question 4

How many atoms in this molecule have a trigonal planar geometry?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
A)  one 
B)  two 
C)  three 
D)  four

Question 5

A ClO2- ion has _____ valence electrons.

Accepted Answer

A)  16 
B)  18 
C)  20 
D)  22 
A)  16 
B)  18 
C)  20 
D)  22

Question 6

How many atoms in this molecule have a tetrahedral geometry?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
A)  one 
B)  two 
C)  three 
D)  four

Question 7

Which molecule does NOT have a lone pair on the central atom?

Accepted Answer

A)  NH3 
B)  SF2 
C)  PCl3 
D)  CO2 
A)  NH3 
B)  SF2 
C)  PCl3 
D)  CO2

Question 8

The Lewis structure of the cyanide ion is shown here.How many valence electrons are in this ion?

Accepted Answer

A)  11 
B)  10 
C)  8 
D)  7 
A)  11 
B)  10 
C)  8 
D)  7

Question 9

Which compound has an expanded octet around the central atom?

Accepted Answer

A)  NH3 
B)  PCl3 
C)  SF6 
D)  CF4 
A)  NH3 
B)  PCl3 
C)  SF6 
D)  CF4

Question 10

Based on the Pauling electronegativities,an Fr-F bond is:

Accepted Answer

A)  ionic. 
B)  covalent. 
C)  polar ionic. 
D)  polar covalent. 
A)  ionic. 
B)  covalent. 
C)  polar ionic. 
D)  polar covalent.

Question 11

What is the electronic geometry around the oxygen atoms in CO2?

Accepted Answer

A)  trigonal planar 
B)  linear 
C)  tetrahedral 
D)  bent 
A)  trigonal planar 
B)  linear 
C)  tetrahedral 
D)  bent

Question 12

Which atom is the MOST electronegative?

Accepted Answer

A)  Li 
B)  C 
C)  P 
D)  O 
A)  Li 
B)  C 
C)  P 
D)  O

Question 13

A neutral carbon atom has _____ valence electrons.

Accepted Answer

A)  two 
B)  four 
C)  five 
D)  eight 
A)  two 
B)  four 
C)  five 
D)  eight

Question 14

Based on the Pauling electronegativities,a C-H bond is:

Accepted Answer

A)  ionic. 
B)  covalent. 
C)  polar ionic. 
D)  polar covalent. 
A)  ionic. 
B)  covalent. 
C)  polar ionic. 
D)  polar covalent.

Question 15

Which atom is the MOST electronegative?

Accepted Answer

A)  Ca 
B)  Sr 
C)  Ba 
D)  Be 
A)  Ca 
B)  Sr 
C)  Ba 
D)  Be

Question 16

A neutral sulfur atom has _____ valence electrons.

Accepted Answer

A)  two 
B)  four 
C)  six 
D)  eight 
A)  two 
B)  four 
C)  six 
D)  eight

Question 17

A oxygen atom with one bond and three lone pairs has a charge of:

Accepted Answer

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

Question 18

Based on the Pauling electronegativities,a P-Cl bond is:

Accepted Answer

A)  ionic. 
B)  covalent. 
C)  polar ionic. 
D)  polar covalent. 
A)  ionic. 
B)  covalent. 
C)  polar ionic. 
D)  polar covalent.

Question 19

What is the correct ELECTRONIC GEOMETRY and MOLECULAR GEOMETRY around the central nitrogen in NO2-? (Hint: You may need to draw the molecule.)

Accepted Answer

A)  tetrahedral,trigonal pyramidal 
B)  tetrahedral,tetrahedral 
C)  linear,linear 
D)  trigonal planar,bent 
A)  tetrahedral,trigonal pyramidal 
B)  tetrahedral,tetrahedral 
C)  linear,linear 
D)  trigonal planar,bent

Question 20

Which Lewis structure BEST describes the carbonate ion?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Which compound has 24 valence electrons?

Which statement is CORRECT concerning the cyanide ion?

What is the formal charge on the nitrogen atom in this structure?

How many atoms in this molecule have a trigonal planar geometry?

A ClO₂^-ion has _____ valence electrons.

How many atoms in this molecule have a tetrahedral geometry?

Which molecule does NOT have a lone pair on the central atom?

The Lewis structure of the cyanide ion is shown here.How many valence electrons are in this ion?

Which compound has an expanded octet around the central atom?

Based on the Pauling electronegativities,an Fr-F bond is:

What is the electronic geometry around the oxygen atoms in CO₂?

Which atom is the MOST electronegative?

A neutral carbon atom has _____ valence electrons.

Based on the Pauling electronegativities,a C-H bond is:

Which atom is the MOST electronegative?

A neutral sulfur atom has _____ valence electrons.

A oxygen atom with one bond and three lone pairs has a charge of:

Based on the Pauling electronegativities,a P-Cl bond is:

What is the correct ELECTRONIC GEOMETRY and MOLECULAR GEOMETRY around the central nitrogen in NO₂^-? (Hint: You may need to draw the molecule.)

Which Lewis structure BEST describes the carbonate ion?

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Solids, Liquids, and Gases

Solutions

Acids Bases

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

Exam 9: Covalent Bonding and Molecules

Which compound has 24 valence electrons?

Which statement is CORRECT concerning the cyanide ion?

What is the formal charge on the nitrogen atom in this structure?

How many atoms in this molecule have a trigonal planar geometry?

A ClO2- ion has _____ valence electrons.

How many atoms in this molecule have a tetrahedral geometry?

Which molecule does NOT have a lone pair on the central atom?

The Lewis structure of the cyanide ion is shown here.How many valence electrons are in this ion?

Which compound has an expanded octet around the central atom?

Based on the Pauling electronegativities,an Fr-F bond is:

What is the electronic geometry around the oxygen atoms in CO2?

Which atom is the MOST electronegative?

A neutral carbon atom has _____ valence electrons.

Based on the Pauling electronegativities,a C-H bond is:

Which atom is the MOST electronegative?

A neutral sulfur atom has _____ valence electrons.

A oxygen atom with one bond and three lone pairs has a charge of:

Based on the Pauling electronegativities,a P-Cl bond is:

What is the correct ELECTRONIC GEOMETRY and MOLECULAR GEOMETRY around the central nitrogen in NO2-? (Hint: You may need to draw the molecule.)

Which Lewis structure BEST describes the carbonate ion?

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Solids, Liquids, and Gases

Solutions

Acids Bases

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

A ClO₂^-ion has _____ valence electrons.

What is the electronic geometry around the oxygen atoms in CO₂?

What is the correct ELECTRONIC GEOMETRY and MOLECULAR GEOMETRY around the central nitrogen in NO₂^-? (Hint: You may need to draw the molecule.)