WorksheetsCI2: Compounds and Elements
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
2.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
3.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
4.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
5.
Which of the following is an example of a chemical element?
a)
sodium chloride (NaCl)
b)
water (H2O)
c)
nitrogen (N)
d)
glucose (C6H12O6)
6.
Look carefully at the following chemical formulas:
CaCO3 NaHCO3 MgSO4
How many different elements are shown in these three formulas?
a)
3
b)
7
c)
10
d)
17
7.
Which container(s) hold a pure substance?
a)
A
b)
B
c)
C
d)
D
8.
Which container(s) hold a mixture?
a)
A
b)
B
c)
C
d)
D
9.
Which container(s) hold an element?
a)
A
b)
B
c)
C
d)
D
10.
What is the difference between the substances represented by the symbols Co and CO?
a)
They are two different ways to represent the element cobalt.
b)
One is the symbol for an element, and one is a formula for a compound.
c)
Co represents the element cobalt, and CO represents the element copper
d)
They represent two substances, each made up of two elements
100 %
