Question 1

Choose the compound below that should have the lowest melting point according to the ionic bonding model.

Accepted Answer

A)   LiF
B)   NaCl
C)   CsI
D)   KBr
E)   RbI

Question 2

Choose the best Lewis structure for BF3.

Accepted Answer

A)   3. 
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E)   3. 
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Question 3

Use Lewis theory to determine the chemical formula for the compound formed between Mg and Br.

Accepted Answer

A)   MgBr
B)   Mg2Br3
C)   Mg3Br2
D)   MgBr2
E)   Mg2Br

Question 4

Place the following in order of decreasing magnitude of lattice energy. KF MgS RbI

Accepted Answer

A)   RbI > KF > MgS
B)   RbI > MgS > KF
C)   MgS > RbI > KF
D)   KF > RbI > MgS
E)   MgS > KF > RbI E

Question 5

Which of the following statements is TRUE?

Accepted Answer

A)   A covalent bond is formed through the transfer of electrons from one atom to another.
B)   A pair of electrons involved in a covalent bond are sometimes referred to as "lone pairs."
C)   It is not possible for two atoms to share more than two electrons.
D)   Single bonds are shorter than double bonds.
E)   A covalent bond has a lower potential energy than the two separate atoms.

Question 6

Identify the number of valence electrons for ICl5.

Accepted Answer

A)   36
B)   40
C)   42
D)   44
E)   46

Question 7

Place the following in order of increasing bond length. C-F C-S C-Cl

Accepted Answer

A)   C-S 
B)   C-Cl 
C)   C-F 
D)   C-F 
E)   C-S < C-F < C-Cl

Question 8

Place the following in order of decreasing bond length. H-F H-I H-Br

Accepted Answer

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

Question 9

How many lone pairs of electrons are on the I atom in IF4+?

Accepted Answer

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

Question 10

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

Accepted Answer

A)   Li2O > K2O > Rb2S
B)   Li2O > Rb2S > K2O
C)   Rb2S > K2O > Li2O
D)   Rb2S > Li2O > K2O
E)   K2O > Li2O > Rb2S

Question 11

Choose the best Lewis structure for SO42⁻.

Accepted Answer

A)   42⁻. 
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D)   42⁻. 
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Question 12

The compound ClF contains ________.

Accepted Answer

A)   ionic bonds
B)   nonpolar covalent bonds
C)   polar covalent bonds with partial negative charges on the F atoms
D)   polar covalent bonds with partial negative charges on the Cl atoms C

Question 13

Which of the following processes is exothermic?

Accepted Answer

A)   the second ionization energy of Mg
B)   the sublimation of Li
C)   the breaking of the bond of I2
D)   the formation of NaBr from its constituent elements in their standard state
E)   None of the above processes is exothermic

Question 14

Which of the following represent the Lewis structure for N?

Accepted Answer

A)   
B)   
C)   
D)   
E)    A

Question 15

Place the following in order of increasing magnitude of lattice energy. MgO LiI CaS

Accepted Answer

A)   CaS 
B)   LiI 
C)   MgO 
D)   LiI 
E)   MgO < LiI < CaS

Question 16

A single covalent bond contains ________ of electrons.

Accepted Answer

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

Question 17

In the best Lewis structure for CN-, what is the formal charge on the N atom?

Accepted Answer

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

Question 18

Identify the number of bonding pairs and lone pairs of electrons in water.

Accepted Answer

A)   1 bonding pair and 1 lone pair
B)   1 bonding pair and 2 lone pairs
C)   2 bonding pairs and 2 lone pairs
D)   2 bonding pairs and 1 lone pair
E)   3 bonding pairs and 2 lone pairs

Question 19

Draw the best Lewis structure for Cl3⁻. What is the formal charge on the central Cl atom?

Accepted Answer

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

Question 20

Identify the compound or element with metallic bonding.

Accepted Answer

A)   NaCl
B)   Li
C)   H2O
D)   He
E)   S

Exam 9: Chemical Bonding I: Lewis Theory

Choose the compound below that should have the lowest melting point according to the ionic bonding model.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for BF3.

Correct AnswerverifiedShow Answer

Use Lewis theory to determine the chemical formula for the compound formed between Mg and Br.

Correct AnswerverifiedShow Answer

Place the following in order of decreasing magnitude of lattice energy. KF MgS RbI

Correct AnswerverifiedE

Which of the following statements is TRUE?

Correct AnswerverifiedShow Answer

Identify the number of valence electrons for ICl5.

Correct AnswerverifiedShow Answer

Place the following in order of increasing bond length. C-F C-S C-Cl

Correct AnswerverifiedShow Answer

Place the following in order of decreasing bond length. H-F H-I H-Br

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are on the I atom in IF4+?

Correct AnswerverifiedShow Answer

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for SO42⁻.

Correct AnswerverifiedShow Answer

The compound ClF contains ________.

Correct AnswerverifiedC

Which of the following processes is exothermic?

Correct AnswerverifiedShow Answer

Which of the following represent the Lewis structure for N?

Correct AnswerverifiedA

Place the following in order of increasing magnitude of lattice energy. MgO LiI CaS

Correct AnswerverifiedShow Answer

A single covalent bond contains ________ of electrons.

Correct AnswerverifiedShow Answer

In the best Lewis structure for CN-, what is the formal charge on the N atom?

Correct AnswerverifiedShow Answer

Identify the number of bonding pairs and lone pairs of electrons in water.

Correct AnswerverifiedShow Answer

Draw the best Lewis structure for Cl3⁻. What is the formal charge on the central Cl atom?

Correct AnswerverifiedShow Answer

Identify the compound or element with metallic bonding.

Correct AnswerverifiedShow Answer

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Choose the best Lewis structure for BF₃.

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E

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Identify the number of valence electrons for ICl₅.

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How many lone pairs of electrons are on the I atom in IF₄⁺?

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Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O

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Choose the best Lewis structure for SO₄²⁻.

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The compound ClFcontains ________.

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C

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A

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In the best Lewis structure for CN^-, what is the formal charge on the N atom?

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Draw the best Lewis structure for Cl₃⁻. What is the formal charge on the central Cl atom?

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