Question

______ is the most abundant gas in the atmosphere and makes up 78% of the air.

Answer 1

Air is a homogeneous mixture of different gases. Air is mainly composed of nitrogen (78%), oxygen(21%), carbon dioxide (0.03%), and other gases 1%.

Nitrogen is the most abundant gas in the atmosphere. It is a colorless and odorless gas. It is very important for the growth and development of plants.

Therefore, nitrogen is the most abundant gas in the atmosphere and makes up 78% of the air.