Chemical Formula

The atomic composition of molecules can be described and shown in either:
- Words:
' Each molecule of Carbon Monoxide is made up of one Carbon atom and one oxygen atom'

- Chemical Formula
'CO'

Chemical formulas are useful for Chemical Equations, and are easier to see. Some common examples are shown here:
- Water Molecule (H2O)
- Oxygen Molecule (O2)
- Ozone Molecule (O3)
- Carbon Monoxide (CO)
- Carbon Dioxide (CO2)

Full List:

Chemical Name

Chemical Formula

No. Of types of atoms Or No. Of elements

No. of atoms

Oxygen

O2

1

2

Ozone

O3

1

3

Hydrogen

H2

1

2

Nitrogen

N2

1

2

Water

H2O

2

3

Carbon Monoxide

CO

2

2

Carbon Dioxide

CO2

2

3

Methane

CH4

2

5

Tetra Chloromethane

CCL4

2

5

Sulphuric Acid

H2SO4

3

7

Ammonia

NH3

2

4

Glucose

C6H12O6

3

24

Sodium Hydroxide

NaOH

3

3