If the valancy of hydrogen is 1 and that of nitrogen is 3 , work out the formula of ammonia.

Explanation

Two reasons for forming a large number of compounds by carbon are :
Catenation : It is the property of carbon to link to other carbon atoms forming straight chain, branched chain and ring compounds.
Tetravalency : Carbon has a valency of four. Also it can link to atoms other than hydrogen, like oxygen, nitrogen and halogens to form a wide variety of compounds.