Nitrogen

• It is the most abundant component of the air.
• Nitrogen does not support burning.
• Nitrogen is a very unreactive gas.
• All the living things need nitrogen compounds for their growth.
• It is the gas present inside the glass tumbler after the candle is extinguished. 
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Uses of Nitrogen:

1. It is used in the manufacture of ammonia.
2. To produce nitric acid and subsequently used as a fertilizer.
3. Liquid nitrogen is utilized as a refrigerant for transporting foodstuff and freezing purposes.
4. Nitrogen gas is used to help with food preservation by preventing oxidative damage leading to food spoiling.