Deck 10: Chemical Bonding

Question 1

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

Answer 1

False

Question 2

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

Answer 2

False

Question 3

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

Answer 3

False

Question 4

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

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

The Lewis structure for O₂ contains a triple bond.

Question 10

The Lewis structure of oxygen should have 8 valence electrons.

Question 11

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

Question 12

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

Question 13

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

Question 14

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

Question 15

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

Question 16

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

Question 17

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

Question 18

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

Question 19

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

Question 20

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

Question 21

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 22

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

Question 23

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

Question 24

The sulfate ion contains 28 valence electrons.

Question 25

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 26

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

Question 27

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

Question 28

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

Question 29

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

Question 30

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

Question 31

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

Question 32

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

Question 33

Which Lewis structure below correctly represents KCl?

A)K⁺ [ ]⁻
B)K⁺ [: :]⁻
C)K : :
D): : : :
E)none of the above

Question 34

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

Question 35

The ammonium ion contains 10 valence electrons.

Question 36

Carbon monoxide contains resonance Lewis structures.

Question 37

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

Question 38

Boron forms compounds that violate the octet rule.

Question 39

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

Question 40

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

Question 41

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 42

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 43

The Lewis model 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 44

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 45

What is the correct Lewis structure for CN⁻?

A)[C-N]⁻
B)[: - :]⁻
C)[ = :]⁻
D)[: C≡ N :]⁻
E)none of the above

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

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 48

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 49

The Lewis model 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 50

The Lewis structure,[: - = ] best represents:

A)NO₂⁺
B)NO₂^-
C)NO₂
D)both NO₂⁺ and NO₂^-
E)answers A,B,and C

Question 51

What is the correct Lewis structure for water?

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

Question 52

How many bonding electrons are in the Lewis structure of carbon monoxide,CO?

A)2
B)3
C)4
D)6
E)none of the above

Question 53

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 54

How many valence electrons are in the nitrate ion?

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

Question 55

The Lewis model 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 56

What is the correct Lewis structure for N₂?

A)N-N
B): - :
C) =
D): N ≡ N :
E)none of the above

Question 57

What is the correct Lewis structure for CO₂?

A): - - :
B): = = :
C): = C= :
D): = C= :
E)none of the above

Question 58

The Lewis model 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 59

How many bonding electrons are in the Lewis structure of N₂?

A)2
B)3
C)4
D)6
E)none of the above

Question 60

What is the correct Lewis structure for Br₂?

A)Br-Br
B): - :
C) =
D): Br≡ Br :
E)none of the above

Question 61

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 62

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 63

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 64

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 65

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 66

Which molecule below would have a Lewis structure that is an exception to the octet rule?

A)BH₃
B)NO
C)SI₆
D)PF₅
E)all of these

Question 67

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 68

What is the molecular geometry of ozone,O₃?

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

Question 69

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 70

What is the molecular geometry of carbon dioxide, ?

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

Question 71

Consider the Lewis structures for the compound SO₃ and the polyatomic ions SO₃^2- and SO₄^2-.Which of these must 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 72

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 73

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 74

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 75

Which of the following compounds have resonance structures?

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

Question 76

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 77

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 78

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 79

Which one of the following molecules is NOT capable of having resonance structures?

A)SeO₂
B)H₂O
C)SO₂
D)O₃
E)none of the above

Question 80

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

A)→
B)←
C)↔
D)≡
E)none of the above