NEW
Font size
S
M
L
XL
WorksheetsBonding Models and Lewis Structures
Total questions: 24
Worksheet time: 19mins
Name
Class
Date
1.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
2.
Metals and nonmetals form which kind of bond?
a)
Polar covalent
b)
Ionic
c)
Non-polar covalent
d)
Metallic
3.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
4.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
5.
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
6.
How many electrons should Carbon have around its Lewis dot model?
a)
1
b)
3
c)
4
d)
5
7.
In the correct Lewis structure for water, how many unshared pairs of electrons will oxygen have?
a)
1
b)
4
c)
3
d)
2
8.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
9.
Which of the following elements will NOT be surrounded by an octet of electrons in a correctly drawn Lewis structure?
a)
carbon
b)
oxygen
c)
chlorine
d)
hydrogen
10.
Which of the following is an ionic bond?
a)
H3N
b)
CaCl2
c)
NO2
d)
SCl
11.
How many valence electrons do elements in Group 2A have?
a)
12
b)
4
c)
1
d)
2
12.
Which is the correct structure for ammonia?
Pictures correspond with a-d.
Pictures correspond with a-d.
a)
Option A.
b)
Option B.
c)
Option C.
d)
Option D.
13.
Choose the structure that forms a double bond.
a)
Carbon monoxide (CO)
b)
Carbon dioxide (CO2)
c)
Water (H2O)
d)
Cyanic Acid (HCN)
14.
Choose the structure that forms a triple bond.
a)
Hydrogen
b)
Fluorine
c)
Oxygen
d)
Nitrogen
15.
What is the correct structure for BF3?
a)
Option A.
b)
Option B.
c)
Option C.
d)
Option D.
16.
How many valence electrons are in Phosphorus?
a)
15
b)
4
c)
5
d)
31
17.
How many electrons does each line indicate are shared?
a)
1
b)
2
c)
3
d)
4
18.
What is the first thing you need to do when drawing Lewis Structures?
a)
Draw your bonds
b)
Count the number of valence electrons
c)
Subtract to make the valence number even
d)
Add to make the valence number even
19.
After drawing in your bonds, what do you do if you don't have enough electrons to get each atom to its octet?
a)
Place dots until everything has eight
b)
Place dots only around the terminal atoms
c)
Add a multiple bond
d)
Have eight only around the central atom
20.
In a Lewis structure, what do you do with the total number of valence if your ion is 2- charged?
a)
Add 2 to the valence number
b)
Subtract 2 from the valence number
c)
Multiply the valence number by 2
d)
Divide the valence number by 2
21.
In a Lewis structure, what do you do with the total number of valence if your ion is + charged?
a)
Divide the valence number by 1
b)
Multiply the valence number by 1
c)
Add 1 to the valence number
d)
Subtract 1 from the valence number
22.
How many electrons do atoms need to be stable?
a)
1
b)
2
c)
6
d)
8
23.
How many covalent bonds does carbon need to form in order to have a full octet?
a)
2
b)
3
c)
4
d)
5
24.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
Reset
