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Ionic and Covalent Compounds

Total questions: 35

Worksheet time: 36mins

Name
Class
Date
1.

States that atoms react in order to become stable like a noble gas.

a)

octet rule

b)

electron rule

c)

ionic rule

d)

coordination rule

2.

Refers to the electrons in the outer shell of an element.

a)

valence electrons

b)

coordination electrons

c)

metallic electrons

d)

orbital electrons

3.

How many valence electrons are in an atom of Phosphorus?

a)

2

b)

3

c)

4

d)

5

4.

How many valence electrons are in an atom of Magnesium?

a)

2

b)

3

c)

4

d)

5

5.

How many valence electrons are in an atom of Silicon?

a)

2

b)

4

c)

6

d)

8

6.

What is the charge of a Strontium ion?

a)

-2

b)

-1

c)

+1

d)

+2

7.

How many electrons does barium have to give up to follow the octet rule?

a)

1

b)

2

c)

3

d)

4

8.

Which of the following elements forms an ion with a -1 charge?

a)

fluorine

b)

hydrogen

c)

potassium

d)

sodium

9.

What is the overall charge of an ionic compound?

a)

2-

b)

1-

c)

0

d)

1+

10.

A compound composed of a cation and an anion is called a(n)

a)

diatomic molecule

b)

polar compound

c)

covalent compound

d)

ionic compound

11.

Which formula shows an ionic compound?

a)

FCl

b)

SCl2

c)

N2O3

d)

Al2O3

12.

According to the octet rule most elements need _______ valence electrons.

a)

2 or 8

b)

0 or 8

c)

0 or 6

d)

8 or 18

13.

What is the formula for chromium(III) sulfide? Hint: Cr3+ and S2-

a)

Cr2S3

b)

Cr3S2

c)

CrS

d)

Cr(SO3)3

14.

What is the formula for mercury(II) nitride? Hint: Hg2+ and N3-

a)

Hg3N2

b)

Hg2N

c)

HgNO3

d)

Hg(NO3)2

15.

Ionic bonds generally occur between ______.

a)

metals.

b)

nonmetals.

c)

a metal and a nonmetal

d)

noble gases

16.

What is the formula for sodium nitride? Hint: Na1+ and N3-

a)

NaN

b)

Na2N

c)

Na3N

d)

NaN3

17.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
18.
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
19.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
20.

Which is the correct structure for ammonia NH3?

Pictures correspond with a-d.

a)

Option A.

b)

Option B.

c)

Option C.

d)

Option D.

21.
Choose the structure that forms a double bond.
a)
Carbon monoxide (CO)
b)
Carbon dioxide (CO2)
c)
Water (H2O)
d)
Cyanic Acid (HCN)
22.
 Choose the structure that forms a triple bond.
a)
Hydrogen
b)
Fluorine
c)
Oxygen
d)
Nitrogen
23.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
24.

How many total valence electrons are participating in bonding in the molecule above?

a)

8

b)

4

c)

2

d)

3

25.

CO2 has how many lone pairs?

a)

0

b)

1

c)

2

d)

3

e)

4

26.

NH3 has how many lone pairs?

a)

0

b)

1

c)

2

d)

3

27.

CCl4 has how many double bonds?

a)

0

b)

1

c)

2

d)

3

28.
 A lone pair is defined as
a)
A pair of bonding electrons
b)
One non-bonding electron
c)
A pair of non-bonding electrons
d)
A pair of electrons on the central atom
29.

An atom with 3 valence electrons "wants" a full shell, so it can either gain 5 or lose 3. Which is more likely to occur?

a)

Gain 5

b)

Lose 3

c)

Nothing

30.

Which atom will never be in the middle of a Lewis Dot structure?

a)

N

b)

C

c)

H

d)

P

31.

Which atom goes in the middle of the Lewis Dot structure?

a)

The one the needs the least number of valence electrons

b)

The most electronegative element

c)

The one that needs the most or is less electronegative generally

32.
A covalent compound made of one sulfur and two oxygen atoms would be named
a)
sulfur dioxide.
b)
sulfur oxide.
c)
disulfur oxide.
d)
sulfide oxygen.
33.
An ionic compound made of copper (Cu2+) and oxygen would be named
a)
copper oxygen.
b)
copper oxide.
c)
dicopper oxide.
d)
copper(II) oxide.
34.
The covalent compound N2O5 would be named
a)
nitrogen oxide.
b)
dinitrogen oxide.
c)
nitrogen pentoxide.
d)
dinitrogen pentoxide.
35.
The chemical formula for an ionic compound of potassium and oxygen is
a)
KO.
b)
K2O.
c)
K2O2.
d)
KO2.

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