Do you know what Gas makes up most of the earth’s atmosphere? The air we breathe, the invisible embrace that envelops our planet, is a complex mixture of gases that sustains life as we know it. Among this celestial blend, one gas stands out as the unassuming yet mighty leader—nitrogen. In this exploration, we’ll unravel the secrets of Earth’s atmospheric composition and shed light on the crucial role played by nitrogen.
The most abundantly present gas in the atmosphere by far is nitrogen, which accounts for about 78% of the mass of dry air. While the second most abundant gas in the atmosphere is Oxygen, present at levels of 20 to 21%.
List of available gases in the atmosphere and their percentages
| Gas Name | Chemical Formula | Percent Volume |
| Nitrogen | N2 | 78.08% |
| Oxygen | O2 | 20.95% |
| *Water | H2O | 0 to 4% |
| Argon | Ar | 0.93% |
| *Carbon Dioxide | CO2 | 0.0360% |
| Neon | Ne | 0.0018% |
| Helium | He | 0.0005% |
| *Methane | CH4 | 0.00017% |
| Hydrogen | H2 | 0.00005% |
| *Nitrous Oxide | N2O | 0.00003% |
| *Ozone | O3 | 0.000004% |