Nitrogen is the most abundant gas in the atmosphere, with a volume concentration of 78%.

   Many nitrogen compounds can be used as fertilizers, providing the vital nitrogen nutrients for plant growth.

Liquid nitrogen is a cryogen. One special application of liquid nitrogen is to make ultra-smooth ice cream.

Nitrogen gas is very stable. It is used as a packaging gas to preserve food freshness.  

Many nitrogen compounds were used to make powerful explosives which brought disasters to humans during wars.


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