| Air
is not a substance. Air is a mixture of substances that are
all in their gas state.
The table below shows its composition:
| Substance |
No. of particles
in every 10000 particles of air |
Percentage |
 |
|
| Nitrogen |
7800 |
78.00 |
| Oxygen |
2100 |
21.00 |
| Argon |
93 |
0.93 |
| Carbon Dioxide |
3 |
0.03 |
| Other Substances |
4 |
0.04 |
|
|
|
