Chemical formulae
Task
Fill in the missing spaces in the table below: Name of
substance
Diagram of
molecule
Water
H
O
Nitrogen
Carbon dioxide
N
O
Chemical formula
Element or
compound?
H
N
O
C
H
Ammonia
N
H
Sulfur dioxide
H
O
O
S
Hydrogen
H
H
Hydrogen chloride
Cl
H
Oxygen
O
O
© www.teachitscience.co.uk 2017
28620
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Chemical formulae
Answers
Name of
substance
Diagram of
molecule
Water
H
O
Nitrogen
Carbon dioxide
N
O
Chemical formula
Element or
compound?
H2O
compound
N2
element
CO2
compound
NH3
compound
SO2
compound
H
N
O
C
H
Ammonia
N
H
Sulfur dioxide
H
O
O
S
Hydrogen
H
H
H2
element
Hydrogen chloride
Cl
H
HCl
compound
Oxygen
O
O
O2
element
© www.teachitscience.co.uk 2017
28620
Page 2 of 2