Nitrogen

Nitrogen constitutes approximately 78% of the atmosphere. At ambient temperature, nitrogen is a colourless, odourless and tasteless gas. Though it is non-toxic, high concentrations of it can displace oxygen which is needed for breathing. Under atmospheric pressure, nitrogen liquefies at a temperature of -196°C.

In industry and research, N2 is used as a coolant or as an inert gas. After use, it is returned to the atmosphere unchanged.

  

 

  
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