Why is it neccessary to have 78percentage of nitrogen in the atmosphere
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Compared to O, N is 4 times as abundant in the atmosphere. ... This is one reason why nitrogen is so enriched in the atmosphere relative to oxygen. The other primary reason is that, unlike oxygen, nitrogen is very stable in the atmosphere and is not involved to a great extent in chemical reactions that occur there.
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it is not necessary to have 78% of nitrogen in the atmosphere and the amount of nitrogen is four times richer than oxygen so that's why amount of nitrogen is greater.
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