Answer:
Nitrogen
Explanation:
Nitrogen is the most gas as it is the most abundant gas in atmosphere. It constitutes nearly 78% of the earth's atmospheric gases composition. After nitrogen, oxygen is the second most gas followed by carbon dioxide and other rare gases (only 1%).
Atmosphere consists of some amount of water vapor (1%). Small particles like aerosols, dust, spores and pollen, volcanic ash, smoke, etc. are also found
