Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Compounds and Formulae

Total questions: 50

Worksheet time: 50mins

Name
Class
Date
1.

Which of the following is not a compound?

a)

HCl

b)

Cl

c)

NaCl

d)

CO2

2.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
3.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
4.
Which of the following an element?
a)
Carbonic Acid
b)
Copper
c)
Iron and Copper
d)
Water
5.
a)
1
b)
2
c)
3
d)
4
6.
a)
1
b)
2
c)
3
d)
4
7.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
8.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
9.
Is water an element or a compound?
a)
Element
b)
Compound
10.
A compound consists of two or more elements bound together.
a)
True
b)
False
11.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
12.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
13.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
14.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
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.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
18.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
19.
Which of the following chemical formulas represents a compound? 
a)
C3
b)
O2
c)
CH3CHO
d)
H2
20.

Can be found on the periodic table

a)

Element

b)

Compound

c)

Mixture

21.
Which of these is an element?
a)
H2Cr
b)
Cr3
c)
OH
d)
PNi
22.
How many molecules are in 10MgCl2?
a)
10
b)
2
c)
30
d)
13
23.
How many elements are present in this compound?
Mg2As3COHNi2
a)
2
b)
4
c)
6
d)
10
24.
If there is no subscript, there is ______ atom(s) of that element.
a)
0
b)
2
c)
only 1
d)
1 million
25.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
26.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
27.
How many nitrogen atoms in 
Mg(NO3)2
a)
1
b)
2
c)
3
d)
6
28.
How many magnesium atoms in 
Mg(NO3)2
a)
1
b)
2
c)
3
d)
6
29.
How many oxygen atoms in 
Mg(NO3)2
a)
1
b)
2
c)
3
d)
6
30.
How many nitrogen atoms are in 
(NH4)3PO4
a)
1
b)
4
c)
3
d)
12
31.
How many hydrogen atoms are in 
(NH4)3PO4
a)
1
b)
4
c)
3
d)
12
32.
How many oxygen atoms are in 
(NH4)3PO4
a)
1
b)
4
c)
3
d)
12
33.
How many oxygen atoms in total are in 
CuSO4⋅5H2O
a)
1
b)
2
c)
5
d)
9
34.

How many total atoms are in this formula? 3Zn2O3H

a)

6

b)

9

c)

18

35.
Which of these formulas contain equal numbers of nitrogen atoms?
a)
Formulas I and III
b)
Formulas I and IV
c)
Formulas II and III
d)
Formulas I, II, and V
36.
How many elements are in H2O?
a)
1
b)
2
c)
3
d)
4
37.
In the chemical formula for sucrose (C12H22O11), how many oxygen atoms are there in each molecule?
a)
12
b)
22
c)
11
d)
1
38.
A compound ___.
a)
is a pure element
b)
has the same properties as its parts
c)
is a combination of two or more elements
d)
is composed of only metals
39.

A substance that cannot be separated into simpler substances by any means.

a)

Element

b)

Compound

c)

Mixture

d)

Chemical

40.
These contain only one kind of atom. 
a)
element 
b)
compound 
c)
mixture 
d)
water 
41.

Which is the correct model for 2H2O?

a)
b)
c)
d)
42.
What is the CHEMICAL FORMULA for the molecular model pictured above?
a)
CH2O
b)
C2H2O2
c)
CHO2
d)
CHO
43.
What is the CHEMICAL FORMULA for the molecular model pictured above?
a)
CH
b)
C4H4
c)
CH4
d)
C4H
44.

How many elements are in the compound C2H8O ?

a)

2

b)

1

c)

3

d)

0

45.
The formula for glucose is C6H12O6. How many elements does glucose contain?
a)
1
b)
3
c)
24
d)
432
46.

Which of the following lists all the elements that are present in a molecule of potassium carbonate, K2CO3 ?

a)

argon and oxygen

b)

phosphate and calcium

c)

potassium, carbon, and oxygen

d)

phosphorus, oxygen, and calcium

47.

___________ are the smallest unit of an element that maintains the properties of that element.

a)

Atoms

b)

Elements

c)

Compounds

d)

Mixtures

48.

An _______________ is made up of one or more of the same kind of atom chemically combined.

a)

atom

b)

element

c)

molecule

d)

compound

49.

True or False: elements AND compounds are pure substances.

a)

True

b)

False

50.

A pure substance is

a)

the way something is put together or combined

b)

two or more different substances not chemically combined

c)

a kind of matter that always has a specific composition chemically combined.

d)

a small number that tells the amount of each element in a compound

Similar Resources on Wayground

Periodic Table Review

47 questions

Periodic Table Review

quiz

Worksheet

•

8th - 9th Grade

Spring Semester Review

52 questions

Spring Semester Review

quiz

Worksheet

•

9th Grade

Kuster ~ Atomic Models and their Scientists

47 questions

Kuster ~ Atomic Models and their Scientists

quiz

Worksheet

•

9th - 12th Grade

Specific Heat and Heating Curve Quiz

45 questions

Specific Heat and Heating Curve Quiz

quiz

Worksheet

•

10th - 12th Grade

Chemical Bonding

50 questions

Chemical Bonding

quiz

Worksheet

•

9th - 12th Grade

Reactivity, Metals and Salts

45 questions

Reactivity, Metals and Salts

quiz

Worksheet

•

9th - 12th Grade

C1 Lessons 1-12

50 questions

C1 Lessons 1-12

quiz

Worksheet

•

9th - 11th Grade

2018-19 2nd QTR Plant and Soil Science

48 questions

2018-19 2nd QTR Plant and Soil Science

quiz

Worksheet

•

10th - 12th Grade