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Chem- Lewis Structures/Molecular Shapes

Total questions: 91

Worksheet time: 1hrs 16mins

Name
Class
Date
1.

Atoms participate in chemical bonds by sharing electrons in their​ (a)   shell, the outermost shell of the atom

Choose from the below words
valence
outer
inner
lower
higher
2.

How many TOTAL VALENCE ELECTRONS are in the diagram for this molecule?

(a)  

3.
What is the the shape of this molecule according to VSPER theory?
a)
Linear
b)
Tetrahedral
c)
Trigonal Planar
d)
Bent
4.

Choose the correct shape for this molecule:


Carbon will be in the middle with no lone pairs

a)

Tetrahedral

b)

Trigonal pyramidal

c)

Bent

d)

Trigonal planar

5.
What is the VSEPR theory used to predict?
a)
Bond Strength
b)
Polarity
c)
Molecular Shape
d)
Electronegativity
6.
Which molecule below would have this shape?
a)
BF3
b)
CH4
c)
PCl5
d)
CO2
7.
What molecular shape is the structure shown here? (NH4+)
a)
linear
b)
trigonal planar
c)
tetrahedral
d)
trigonal pyramidal
8.

What shape will this molecule be?

a)

linear

b)

bent

c)

tetrahedral

d)

trigonal pyramidal

9.
*
a)
trigonal pyramid
b)
linear
c)
bent
d)
angular
10.

Counting all of the electron groups, both bonding pairs and lone pairs, around the central atom leads to the ​ (a)   geometry

Choose from the below words
electron
molecular
shape
pair
11.

Name the molecular shape of this molecule.

a)

linear

b)

bent

c)

trigonal planar

d)

tetrahedral

12.

What will the central atom be for the molecule CH2O?

a)

Carbon

b)

Oxygen

c)

Hydrogen

13.
What is the the shape of this molecule according to VSPER theory?
a)
Linear
b)
Tetrahedral
c)
Trigonal Planar
d)
Trigonal pyramidal
14.

What is the name of this molecule's shape?

a)

Bent

b)

Linear

c)

Tetrahedral

d)

Trigonal pyramidal

15.
What is the shape of this molecule?
a)

Linear

b)

bent

c)

tetrahedral

d)

trigonal planar

16.

Which Lewis Dot Model drawing correctly shows an O2 molecule?

a)
b)
c)
d)
17.
This is a correct dot diagram for magnesium (Mg)
a)
true
b)
false
18.

This is a correct dot diagram for nitrogen (N)

a)

true

b)

false

19.
What element is represented in this Bohr Model? 
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
20.
What molecule could this be? 
a)
BF3
b)
CH4
c)
H2O
d)
CO2
21.

Which state of matter has particles spread far apart that can be most easily compressed?

a)

solid

b)

liquid

c)

gas

22.
?
a)
Helium
b)
Oxygen
c)
Sodium
d)
Phosphorous
23.
This is the correct dot diagram for sodium (Na)
a)
true
b)
false
24.
This could be the dot diagram of
a)
Mg
b)
Cl
c)
C
d)
O
25.

How many SHARED VALENCE ELECTRONS are in the diagram for this molecule?

(a)  

26.

How many electrons does this carbon have on it?

a)

2

b)

4

c)

6

d)

8

e)

0

27.
How many electrons are shared in a triple bond?
a)

6

b)

3

c)

6 pairs

d)

5

28.

What 3-D shape would this molecule have: H2S ?

a)

bent

b)

tetrahedral

c)

linear

d)

trigonal pyramidal

29.

What 3-D shape would this molecule have?

a)

tetrahedral

b)

trigonal planar

c)

trigonal pyramid

d)

bent

30.

NaNO3

a)

ionic

b)

covalent

c)

neither

31.

CH4

a)

Covalent

b)

Ionic

32.
What is a valence electron?
a)
The sum of neutrons and protons.
b)
The # of electrons in the last shell.
c)
A type of bond.
d)
A popular compound.
33.
Ionic or covalent?
NaBr
a)
Ionic
b)
Covalent
34.
What type of bond forms when 2 or more electrons are SHARED?
a)
Covalent bond
b)
Incomplete bond
c)
Ionic bond
d)
Metallic bond
35.

Silicon is a

a)

Metal

b)

Nonmetal

36.

Is O3 an ionic or covalent compound?

a)

Ionic

b)

Covalent

37.

Is CaF2 an ionic or covalent compound?

a)

Ionic

b)

Covalent

38.

Is Na3N an ionic or covalent compound?

a)

Ionic

b)

Covalent

39.
Covalent bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
40.

The formula for nitric acid is HNO3. Given this, choose the correct formula for nitrate.

a)

NO3-2

b)

NO3-1

c)

NO2-2

d)

NO2-1

41.

CN-

a)

peroxide

b)

cyanide

c)

hydroxide

d)

hydronium

42.

NO3-

a)
ammonium
b)
nitrite
c)
nitrate
d)
nitrile
43.

Nitrate

a)
NO-
b)
NO2-
c)
NO3-
d)
NO4-
44.

NO2-

a)
Nitride
b)
Nitrate
c)
Nitrite
d)
Ammonium
45.

PO43–

a)

phosphorus tetroxide

b)

phosphate

c)

sulphate

d)

hydroxide

46.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
47.

What is the name of the molecular geometry for this Lewis Structure?

a)

trigonal planar

b)

trigonal pyramidal

c)

tetrahedral

d)

bent

48.

Name the molecular shape of this molecule.

a)

trigonal planar

b)

linear

c)

tetrahedral

d)

trigonal bipyramidal

49.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
50.

What is the name of this molecule's shape?

a)

Bent

b)

Linear

c)

Tetrahedral

d)

Trigonal pyramidal

51.

What 3-D shape would this molecule have: H2S ?

a)

bent

b)

tetrahedral

c)

linear

d)

trigonal pyramidal

52.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
53.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
54.
Which of the following has a full valence shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
55.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
56.
How many bonds does a hydrogen atom form with other atoms?
a)
1
b)
2
c)
3
d)
4
e)
0
57.
How many bonds does an oxygen atom form with other atoms?
a)
1
b)
2
c)
3
d)
4
e)
0
58.
How many bonds does a nitrogen atom form with other atoms?
a)
1
b)
2
c)
3
d)
4
e)
0
59.
How many bonds does a carbon atom form with other atoms?
a)
1
b)
2
c)
3
d)
4
e)
0
60.
This type of bond is represented by one line.
a)
single bond
b)
double bond
c)
triple bond
d)
pi bond
e)
ionic bond
61.
This type of bond is represented by two lines.
a)
single bond
b)
double bond
c)
triple bond
d)
ionic bond
e)
sigma bond
62.

Which atom(s) have the incorrect number of bonds based on the HONC 1234 rule? (select all that apply)

a)

H

b)

C

c)

O

d)

N

e)

all are correct

63.

Which atom(s) have the incorrect number of bonds based on the HONC 1234 rule? (select all that apply)

a)

H

b)

C

c)

O

d)

N

e)

all are correct

64.

Which atom(s) have the incorrect number of bonds based on the HONC 1234 rule? (select all that apply)

a)

H

b)

C

c)

O

d)

N

e)

all are correct

65.

Which of the following elements in Hydrofluoric acid must have a higher Electronegativity?

a)

F has a higher EN

b)

H has a higher EN

c)

Their EN is the same

66.
How many electrons are shared in a double bond?
a)
2
b)
4
c)
6
d)
8
67.
When two nonmetals do not share electrons evenly, the resulting covalent bond will be
a)
nonpolar
b)
polar
c)
ionic
d)
metallic
68.
The desire for an element to have 8 atoms around it is called 
a)
Octet Rule
b)
Resonance
c)
Ionization energy
d)
Electronegativity
69.
What is the VSEPR theory used to predict?
a)
Bond Strength
b)
Polarity
c)
Molecular Shape
d)
Electronegativity
70.
What molecular shape is the structure shown here? (H2O)
a)
tetrahedral
b)
trigonal planar
c)
bent
d)
trigonal pyramidal
71.

Covalent bonds involve the _________ of electrons

a)

Transfer

b)

Sharing

72.

An atom with 7 valence electrons will

a)

gain 1 electron

b)

loose 7 electrons

c)

loses 1 electron

d)

gain 7 electrons

73.

Which of the following is a polar covalent compound?

a)

Cl-Cl

b)

F-F

c)

C-H

d)

N-O

74.
HCl
a)
Polar 
b)
Nonpolar 
75.
F2
a)
Polar 
b)
Nonpolar 
76.

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

a)

2

b)

4

c)

6

d)

8

e)

10

77.
This is an example of a __________ bond.
a)
non-polar covalent
b)
polar covalent
c)
ionic
d)
metallic
78.

What is the difference in electronegativity for 

SO2SO_2  ?

a)

0.5

b)

1.0

c)

2.0

d)

3.5

e)

2.5

79.

NH3NH_3   is a polar covalent compound. Which atom, N or H, will electrons spend MORE time with?

a)

N

b)

H

80.

If Bromine bonds with Hydrogen, a ____________ bond forms.

Bromine EN = 2.96, Hydrogen EN = 2.20

a)
polar covalent
b)
nonpolar covalent
c)
metallic
d)
ionic
81.

If Boron bonds with Hydrogen, a ____________ bond forms.

Boron EN = 2.04, Hydrogen EN = 2.20

a)
polar covalent
b)
nonpolar covalent
c)
metallic
d)
ionic
82.

What shape will this molecule be?

a)

linear

b)

bent

c)

tetrahedral

d)

trigonal pyramidal

83.

What shape will this molecule be?

a)

linear

b)

bent

c)

tetrahedral

d)

trigonal pyramidal

84.

What shape will this molecule be?

a)

linear

b)

bent

c)

tetrahedral

d)

trigonal pyramidal

85.

How many BONDS are in the diagram for this molecule?

(a)  

86.

The ability of an atom in a molecule to attract electrons is best quantified by the ______.

a)

electronegativity

b)

paramagnetism

c)

diamagnetism

d)

first ionization energy

87.

What is the name of this ion?

a)

fluorine 3

b)

iron(III) ion

c)

iron(3) ion

d)

iron(+3)

88.

What is the name of this ion?

a)

copper(I) ion

b)

copper ion

c)

copper(+1) ion

89.

What is the formula for manganese(III)?

a)

Mg+111

b)

Mn

c)

Mn3-

d)

Mn+3

90.

What is the formula for manganese(II)?

a)

Mg+11

b)

Mn

c)

Mn2-

d)

Mn+3

e)

Mn+2

91.

In this lewis structure

How many shared electrons

a)

6

b)

3

c)

18

d)

24

e)

21

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