Deck 10: Chemical Bonding

Question 1

The Lewis structure of water has two sets of lone pair electrons.

Answer 1

True

Question 2

The Lewis theory predicts that the formula for a compound of magnesium and sulfur is MgS₂.

Answer 2

False

Question 3

The structure
is a proper representation of the bonding in the H₂ molecule.

Answer 3

False

Question 4

The triple bond present in diatomic nitrogen,N₂,is what makes this molecule so reactive.

Question 5

The correct Lewis structure for CO₂ shows that the molecule contains two double bonds.

Question 6

Lewis structures only use the valence electrons in determining the bonding.

Question 7

Lewis theory predicts that the formula for a compound made of aluminum and phosphorus is AlP.

Question 8

Chlorine has 8 valence electrons in the Lewis structure for KCl.

Question 9

The Lewis structure for O₂ contains a triple bond.

Question 10

Bonding theories are used to predict how atoms bond together to form molecules.

Question 11

Li : is the proper Lewis structure (dot structure)for lithium.

Question 12

The Lewis structure of oxygen should have 8 valence electrons.

Question 13

A chemical bond is classified as a covalent bond if it involves the transfer of electrons.

Question 14

Drugs to fight HIV have been developed using bonding theory models.

Question 15

When calculating the number of electrons for the Lewis structure of a polyatomic ion,subtract one electron for each negative charge.

Question 16

Having eight valence electrons is very stable and is called an octet.

Question 17

The double bond is shorter and stronger than a single bond.

Question 18

The Lewis theory predicts that the formula for a compound made of sodium and fluorine is NaF.

Question 19

The correct Lewis structure for potassium in KCl is: K⁺.

Question 20

A correct Lewis structure for an atom of carbon would have eight dots surrounding the symbol of the element.

Question 21

Boron forms compounds that violate the octet rule.

Question 22

The VSEPR theory predicts that the H-C-H angle in CH₄ measures 120°.

Question 23

The correct Lewis structure for CO₂ shows that the carbon atom has two sets of lone pair electrons.

Question 24

The sulfate ion contains 28 valence electrons.

Question 25

Which Lewis structure below correctly represents KCl?

A)K⁺ [
]⁻
B)K⁺ [:
:]⁻
C)K :
:
D):
: :

:
E)none of the above

Question 26

Which of the following statements about Lewis structures is FALSE?

A)An octet is when an atom has 8 valence electrons.
B)A duet is a stable electron configuration for helium.
C)An ionic bond occurs when electrons are transferred.
D)A covalent bond occurs when electrons are shared.
E)All of the above statements are true.

Question 27

The VSEPR theory predicts that the angle between the central carbon atom and the two oxygen atoms in CO₂ measures 180°.

Question 28

When you have 4 electron groups,the electron geometry is tetrahedral.

Question 29

When you have 2 electron groups and none are lone pairs,the molecular geometry is linear.

Question 30

Carbon monoxide contains resonance Lewis structures.

Question 31

Water and oil do not mix because water molecules are nonpolar and molecules that compose oil are generally polar.

Question 32

Which Lewis structure below correctly represents the compound formed between magnesium and sulfur?

A)Mg⁺ [:
:]⁻
B)Mg⁺ [:
:]⁻² Mg⁺
C)[:
:]⁻ Mg⁺² [:

:]⁻
D)Mg⁺² [:
:]⁻²
E)none of the above

Question 33

Resonance structures are the best representation we can draw but do not accurately reflect the true structure.

Question 34

The compound H₂S contains polar bonds but the molecule is nonpolar.

Question 35

Lewis theory predicts that the formula of a compound formed between bromine and aluminum is:

A)AlBr
B)Al₂Br
C)AlBr₃
D)AlBr₂
E)none of the above

Question 36

The ammonium ion contains 10 valence electrons.

Question 37

When you have 4 electron groups and none of them are lone pairs,the molecular geometry is trigonal pyramidal.

Question 38

The electron geometry of a molecule is never the same as its molecular geometry.

Question 39

It is important to identify lone pairs around a central atom because they do not repel other electron groups.

Question 40

When you have 4 electron groups and 1 of them is a lone pair,the molecular geometry is bent.

Question 41

Lewis theory predicts that the formula for a compound between barium and sulfur is:

A)BaS
B)Ba₂S
C)BaS₂
D)BaS₃
E)none of the above

Question 42

What is the correct Lewis structure for Br₂?

A)Br-Br
B):
-

:
C)
=

D): Br≡ Br :
E)none of the above

Question 43

Which sequence below represents the proper order of increasing bond strength?

A)single < double < triple
B)double < single < triple
C)single < triple < double
D)triple < double < single
E)none of the above

Question 44

What is the correct Lewis structure for CN⁻?

A)[C-N]⁻
B)[:
-

:]⁻
C)[
=

:]⁻
D)[: C≡ N :]⁻
E)none of the above

Question 45

Which set shows the correct resonance structures for SeO₂?

A):
-

-

: ↔

=

=

B):
=

-

: ↔ :

-

=

:
C):
=Se=

↔ : O≡ Se-

:↔ :

-Se≡ O :
D)
=

-

: ↔ :

-

=

E)SeO₂ does not have a resonance structure.

Question 46

What is the correct Lewis structure for O₂?

A)O-O
B):
-

:
C)
=

D): O ≡ O :
E)none of the above

Question 47

Lewis theory predicts that the formula for a compound between potassium and sulfur is:

A)KS
B)K₂S
C)KS₂
D)K₃S
E)none of the above

Question 48

What is the correct Lewis structure for water?

A)H-:
:-H
B):
-

-

:
C)H=
=H
D)H-
-H
E)none of the above

Question 49

The Lewis structure for carbon monoxide is
This structures shows

A)4 lone pairs and 1 bonding pair.
B)4 lone pairs and 3 bonding pairs.
C)2 lone pairs and 3 bonding pairs.
D)2 lone pairs and 1 bonding pair.
E)none of the above

Question 50

The total number of electrons to be counted for the Lewis structure of the PO₄^3- polyatomic ion is

A)8.
B)26.
C)29.
D)32.
E)none of the above

Question 51

What is the correct Lewis structure for N₂?

A)N-N
B):
-

:
C)
=

D): N ≡ N :
E)none of the above

Question 52

Which symbol should be used between two structures that represent resonance structures?

A)→
B)←
C)↔
D)≡
E)none of the above

Question 53

How many valence electrons are in the nitrate ion?

A)18
B)22
C)23
D)24
E)26

Question 54

The correct Lewis structure for BF₃ would have exactly:

A)1 double bond.
B)2 double bonds.
C)1 triple bond.
D)no double bonds.
E)none of the above

Question 55

What is the correct Lewis structure for CO₂?

A):
-

-

:
B):
=

=

:
C):
= C=

:
D):
= C=

:
E)none of the above

Question 56

When a nonmetal bonds with a nonmetal

A)a molecular compound forms.
B)a covalent bond is involved.
C)electrons are shared.
D)all of the above are true
E)none of the above

Question 57

The Lewis structure,[:
-
=
] represents

A)NO₂⁺
B)NO₂^-
C)NO₂
D)both NO₂⁺ and NO₂^-
E)none of the above

Question 58

Lewis theory predicts that the formula for a compound between fluorine and calcium is:

A)CaF
B)Ca₂F
C)CaF₂
D)CaF₃
E)none of the above

Question 59

The central atom in the chlorate anion,ClO₃^- is surrounded by

A)two bonding and two unshared pairs of electrons.
B)one bonding and three unshared pairs of electrons.
C)three bonding and one unshared pair of electrons.
D)two double bonds and no unshared pairs of electrons.
E)none of the above.

Question 60

The central atom in the chlorite anion,ClO₂^- is surrounded by

A)one bonding and three unshared pairs of electrons.
B)two bonding and two unshared pairs of electrons.
C)two bonding and one unshared pair of electrons.
D)two double bonds and no unshared pairs of electrons.
E)none of the above

Question 61

Consider the Lewis structures for the compound SO₃ and the polyatomic ions SO₃^2- and SO₄^2-.Which of these would exist as a set of resonance structures?

A)SO₃ only
B)SO₃^2- only
C)SO₄^2- only
D)all of these show resonance
E)none of these show resonance

Question 62

Which of the following compounds would have a linear molecular geometry?
1.N₂
2.H₂S
3.CO₂

A)1 and 2 only
B)1 and 3 only
C)2 and 3 only
D)1,2 and 3
E)neither 1,2,or 3

Question 63

What is the angle between electron groups in the trigonal planar electron geometry?

A)90°
B)109.5°
C)120°
D)180°
E)not enough information

Question 64

What is the molecular geometry of ozone,O₃?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 65

What is the molecular geometry of PH₃?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 66

What is the electron geometry if you have 4 electron groups around the center atom?

A)linear
B)trigonal planar
C)tetrahedral
D)trigonal bipyramidal
E)not enough information

Question 67

What is the molecular geometry of NH₄⁺?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 68

What is the molecular geometry of SCl₂?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 69

What is the molecular geometry of carbon dioxide,CO₂?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 70

What is the molecular geometry of CCl₄?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 71

Which of the following is considered a single electron group?

A)a lone pair of electrons
B)a single bond
C)a double bond
D)a triple bond
E)all of the above

Question 72

What is the angle between electron groups in the tetrahedral geometry?

A)90°
B)109.5°
C)120°
D)180°
E)not enough information

Question 73

What is the molecular geometry if you have 4 single bonds around the central atom?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 74

What is the molecular geometry of SiH₄?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 75

What is the molecular geometry if you have 3 single bonds and 1 lone pair around the central atom?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 76

What is the angle between electron groups in the linear electron geometry?

A)90°
B)109.5°
C)120°
D)180°
E)not enough information

Question 77

What is the molecular geometry if you have a double bond,a single bond and 1 lone pair around the central atom?

A)bent
B)linear
C)tetrahedral
D)trigonal pyramidal
E)not enough information

Question 78

What is the electron geometry if you have 2 electron groups around the center atom?

A)linear
B)trigonal planar
C)tetrahedral
D)trigonal bipyramidal
E)not enough information

Question 79

What is the electron geometry if you have 3 electron groups around the center atom?

A)linear
B)trigonal planar
C)tetrahedral
D)trigonal bipyramidal
E)not enough information

Question 80

Which of the following compounds have resonance structures?

A)CH₄
B)H₂O
C)NH₃
D)O₃
E)None of the compounds have resonance structures.