Which elements makes up most of earth's atmosphere

Nitrogen is the element which is present in the atmosphere about 78 % by volume.

Explanation:

Nitrogen is present in the atmosphere in very high concentration about 78 % by volume. This nitrogen is very important for the growth and development of plants on the earth surface. This nitrogen comes to the earth surface through rainfall which is useful by the plants after conversion of nitrogen molecule into nitrates by nitrifying bacteria.

Which elements makes up most of earth's atmosphere?

The atmosphere is made up of different elements but the most abundance is Nitrogen with 78% while oxygen and others carries the rest percentage including some inert gases