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WorksheetsIonic and Covalent Lewis Structures
Total questions: 25
Worksheet time: 22mins
Name
Class
Date
1.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
2.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
3.
A Lewis structure can be used for showing an ionic bond but instead for dashes for the bonds positive and negative _____ are represented.
a)
atoms
b)
ions
c)
molecules
d)
electrons
4.
If electrons are shared unequally then the bond is....
a)
Non-polar covalent
b)
Ionic
c)
Non-polar ionic
d)
Polar covalent
5.
If electrons are shared equally then the bond is....
a)
Non-polar covalent
b)
Ionic
c)
Non-polar ionic
d)
Polar covalent
6.
Metals and nonmetals form which kind of bond?
a)
Polar covalent
b)
Ionic
c)
Non-polar covalent
d)
Metallic
7.
How strongly an atom attracts electrons is called....................
a)
Ionization energy
b)
Electronegativity
c)
Electricity
d)
Nuclear force
8.
What is the correct combination of elements in a covalent bond?
a)
metal and nonmetal
b)
atoms of 2 different metals
c)
2 nonmetals
d)
atoms of the same metal
9.
How many electrons should an Oxygen atom have around its Lewis dot symbol?
a)
5
b)
6
c)
7
d)
8
10.
Three pairs of electrons are shared in a
a)
Single bond
b)
Double bond
c)
Triple bond
11.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
12.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
13.
In the correct Lewis structure for CH4, how many unshared electron pairs surround the carbon?
a)
2
b)
8
c)
0
d)
4
14.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
15.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
16.
Which of the following is the correct Lewis structure for water?
a)
A
b)
B
c)
C
17.
A covalent bond is
a)
a bond that shares electrons metallicaly
b)
A bond that shares electrons with non metals
c)
Metalloids bonding
d)
metals and nonmetals bonding
18.
In the correct Lewis structure for water, how many unshared pairs of electrons will oxygen have?
a)
1
b)
4
c)
3
d)
2
19.
In CO2, how many UNSHARED pairs of electrons does each oxygen have?
a)
2
b)
1
c)
4
d)
6
20.
Metals and nonmetals form which kind of bond?
a)
Polar covalent
b)
Ionic
c)
Non-polar covalent
d)
Metallic
21.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
22.
Which of the following is an acceptable Lewis structure for CH3Cl?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
23.
In CO2, how many double bonds does Carbon have?
a)
4
b)
1
c)
2
d)
6
24.
Draw the Lewis structure for OF2 and determine the number of lone pairs on the central atom.
a)
none
b)
1
c)
2
d)
it's ionic
25.
Draw NO3- and determine how many single bonds are on Nitrogen
a)
3
b)
2
c)
1
d)
4
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