wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Molecules & Compounds

Total questions: 45

Worksheet time: 36mins

Name
Class
Date
1.
What is the name of K2O?
a)
dipotassium monoxide
b)
dipotassium oxygen
c)
Potassium oxide
d)
Potassium oxygen
2.
What is the name of NF3?
a)
mononitrogen trifluoride
b)
nitrogen trifluoride
c)
nitrogen flouride
d)
nitrogen fluorine 
3.
What is the formula for Sodium Bromide? 
a)
NaBr
b)
NaBr2
c)
Na2Br
d)
Na3Br
4.
What is the name for CO?
a)
Copper Oxide
b)
Carbon monoxide
c)
monocarbon oxide
d)
Copper monoxide
5.
What is the formula for sulfur pentoxide?
a)
SO2
b)
SO3
c)
SO4
d)
SO5
6.

How many atoms of sulfur are in each molecule of H2SO4?

a)

1

b)

4

c)

2

d)

7

7.

Alanine is an amino acid with formula C3H7NO2. How many atoms in all are in each molecule of alanine?

a)

3

b)

7

c)

12

d)

13

8.

How many atoms of carbon are in a molecule of vinyl chloride (C2H3Cl)?

a)

1

b)

3

c)

6

d)

2

9.

Which of the following statements accurately describes the number of atoms in a molecule of ammonia (NH3)?

a)

Three atoms of nitrogen and three atoms of hydrogen

b)

One atom of nitrogen and three atoms of hydrogen

c)

Three atoms of nitrogen and one atom of hydrogen

d)

One atom of nitrogen and one atom of hydrogen

10.

Which of the following accurately describes the chemical formula of the molecule shown above?

a)

3CH8O

b)

C3H7O

c)

C4H8O2

d)

C3H8O

11.

A diagram to a molecule is shown above. Based on the diagram, what is the identity of this compound?

a)

Water (H2O)

b)

Hydronium (H3O+)

c)

Hydrogen peroxide (H2O2)

d)

Hydroxide (OH-)

12.

Based on the diagram of molecule 5, what is the identity of the compound?

a)

Hydrogen peroxide (H2O2)

b)

Hydronium (H3O+)

c)

Hydroxide (OH-)

d)

Water (H2O)

13.

How many atoms of carbon are in the formula CH3CH2CH2OH?

a)

3

b)

1

c)

7

d)

4

14.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
15.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
16.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
17.
The blue atoms are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
18.

What is the charge of the cation in MgF2

a)

2+

b)

2-

c)

1-

d)

1+

19.

What is the charge of the anion in MgF2

a)

2+

b)

2-

c)

1-

d)

1+

20.
The desire for an element to have 8 atoms around it is called 
a)
Octet Rule
b)
Resonance
c)
Ionization energy
d)
Electronegativity
21.
How many Valence Electrons are on Oxygen
a)
2
b)
7
c)
6
d)
1
22.
Which of these would be covalently bonded
a)
Fr and K
b)
Sc and O 
c)
F and Cl
d)
He and Pt
23.
Which of the following describes covalent bonds?
a)
Bonds form because of opposite charges
b)
Bonds form to fill outer electron shells
c)
Electrons are transferred between atoms
d)
Covalent bonds are magical
24.
Electrons have a charge of:
a)
-1
b)
-2
c)
+1
d)
+2
25.
Protons have a charge of:
a)
-1
b)
+1
c)
-2
d)
+2
26.
Most atoms have no net charge because they have....
a)
an equal number of charged and non-charged particles
b)
neutrons in their nuclei
c)
an equal number of electrons and protons
d)
an equal number of neutrons and protons
27.
If a you saw the following, K+; what does it tell you about the  the ion.
a)
it has lost one electron 
b)
it has lost one proton 
c)
it has lost two electrons 
d)
it is a negative ion 
28.
In a covalent bond, one or more electrons are? 
a)
shared 
b)
lost 
c)
gained 
d)
transferred 
29.

Which of the following molecules has the formula CH2O?

a)
b)
c)
d)
30.

Which elements are in the formula shown above?

a)

Cobalt only

b)

Carbon and Oxygen

c)

Copper only

d)

Carbon and Osmium

31.

How many different elements are in an amino acid with the formula C5H11NO2S?

a)

5

b)

20

c)

18

d)

4

32.
Se
a)
2-
b)
2+
c)
3+
d)
4+
33.
K
a)
1+
b)
1-
c)
3+
d)
2-
34.
F
a)
1-
b)
1+
c)
3+
d)
2-
35.
What is the oxidation number of O in CO2?
a)
+2
b)
-1
c)
+4
d)
-2
36.
The sum of all oxidation numbers in a neutral compound is ___.
a)
0
b)
1
c)
-1
d)
depends on the compound
37.
Which of the following compounds is NOT an ionic compound?
a)
NaCl
b)
NH3
c)
Fe2O3
d)
HCl
38.
What element's don't have oxidation numbers?
a)
alkali metals
b)
noble gases
c)
halogens
d)
alkaline earth metals
39.
What is the oxidation number of Ca in Ca3N2?
a)
+3
b)
+2
c)
-3
d)
-2
40.
What are oxidation numbers?
a)
Number of electrons in the outer most energy level
b)
Number of protons
c)
Electrons gained or lost in chemical bonding
d)
Number of neutrons gained or lost
41.
Ionic or covalent?
C  O
a)
Ionic
b)
Covalent
42.
Ionic or covalent?
Na  Br
a)
Ionic
b)
Covalent
43.
Ionic or covalent?
K  Br
a)
Ionic
b)
Covalent
44.
Ionic or covalent?
H  O
a)
Ionic
b)
Covalent
45.

Which of the following elements would combine with Calcium (Ca) to form an ionic compound with a ONE TO ONE formula unit?

a)

Fluorine

b)

Nitrogen

c)

Sulfur

d)

Iodine

Similar Resources on Wayground

40 Common Elements and Their Symbols

40 questions

40 Common Elements and Their Symbols

quiz

Worksheet

•

6th - 9th Grade

SOAL REMEDIAL TLJ KELAS XII SMTR 5 2021-2022

40 questions

SOAL REMEDIAL TLJ KELAS XII SMTR 5 2021-2022

quiz

Worksheet

•

12th Grade

Sci 9 Biology Review

40 questions

Sci 9 Biology Review

quiz

Worksheet

•

9th Grade

702 physic

40 questions

702 physic

quiz

Worksheet

•

8th Grade

Final Test - M3 February 2022

40 questions

Final Test - M3 February 2022

quiz

Worksheet

•

7th - 9th Grade

Force & Motion

45 questions

Force & Motion

quiz

Worksheet

•

8th Grade

Practice Test - Atomic Structure

40 questions

Practice Test - Atomic Structure

quiz

Worksheet

•

6th - 12th Grade

Chapter 2.2 Structure & Functions of Organelles

40 questions

Chapter 2.2 Structure & Functions of Organelles

quiz

Worksheet

•

12th Grade