Theory:

Nitrogen properties.JPG
 
Chemical reactivity:
  
Nitrogen is inactive at normal conditions. It does not combine with elements at normal conditions, but it combines with elements at high temperature and pressure or in the presence of a catalyst.
 
Combustibility:
  
Nitrogen is neither combustible nor support for combustion. Hence, nitrogen in the air moderates the rate of combustion.
 
Reaction with metals:
  
Nitrogen reacts with metals such as lithium (\(Li\)), calcium (\(Ca\)), magnesium (\(Mg\)) (these metals are called electropositive metals), etc., at high temperature and form their corresponding metal nitrides (ionic nitrides).
 
Note: Electropositive means tend to lose electrons to form positive ions.
 
Metal+NitrogenΔMetalnitride
 
Example:
  
6Li+N2Δ2Li3N(Lithiumnitride)3Ca+N2ΔCa3N2(Calciumnitride)
 
Reaction with non-metals:
  
Nitrogen reacts with non-metals such as hydrogen (\(H_2\)), oxygen (\(O_2\)) etc., at high temperature to form their corresponding nitrogen compounds.
 
Nonmetal+NitrogenΔNitrogencompound
 
Example:
  
3H2(Hydrogen)+N2(Nitrogen)Δ2NH3(Ammonia)