Respuesta :

It is 1% because 21% oxygen + 78% nitrogen = 99% of atmospheric gas. 100% = 99% + 1%

Answer:

The correct answer is option A.

Explanation:

Percentage of nitrogen gas in an our atmosphere = 78%

Percentage of oxygen gas in an our atmosphere = 21 %

Percentage of other gases =100% - 78% - 21% = 1%

Our atmosphere is majorly constituted by nitrogen gas that 78 % and oxygen gas with 21 %. Remaining gases present in our atmosphere are present by 1%.