Question 1

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)   5F) A) and D)
G) All of the above

Question 2

List the least electronegative atom.

Accepted Answer

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

Question 3

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)   +2E) B) and D)
F) None of the above

Question 4

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 2F) A) and E)
G) A) and D)

Question 5

The bond angle in NH3 is

Accepted Answer

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

Question 6

Give the number of valence electrons for SO42-.

Accepted Answer

A)   32
B)   30
C)   34
D)   28
E)   36F) A) and E)
G) None of the above

Question 7

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)   4F) A) and C)
G) A) and B)

Question 8

Define formal charge.

Accepted Answer

Formal charge is the charge of...

Question 9

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 bondsF) C) and D)
G) A) and E)

Question 10

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   0F) A) and D)
G) A) and C)

Question 11

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

Accepted Answer

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

Question 12

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.F) D) and E)
G) B) and C)

Question 13

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)   +3F) B) and E)
G) A) and B)

Question 14

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.E) B) and D)
F) B) and C)

Question 15

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 planarF) B) and C)
G) C) and D)

Question 16

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 planarF) C) and E)
G) All of the above

Question 17

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

Accepted Answer

A)   NaCl
B)   SiO2
C)   BrF3
D)   BrFE) B) and D)
F) A) and D)

Question 18

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 planarF) A) and E)
G) None of the above

Question 19

Identify the compound with the highest percent ionic character.

Accepted Answer

A)   HF
B)   IBr
C)   HCl
D)   LiFE) None of the above
F) C) and D)

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-HF) A) and D)
G) None of the above

Exam 6: Chemical Bonding I

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

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

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The bond angle in NH3 is

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

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

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Identify the compound with the highest percent ionic character.

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

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Define formal charge.

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Give the number of valence electrons for SO42-.

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List the least electronegative atom.

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

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

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Choose the bond below that is MOST polar.

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

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

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The bromine atom in Br2 would be expected to have a

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

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

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

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

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

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

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The bond angle in NH₃ is

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

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

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

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

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

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The bromine atom in Br₂ would be expected to have a

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

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

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