The co-valency of nitrogen and hydrogen in `NH_(3)` molecule respectively are

The valency of nitrogen in ammonia (NH_(3)) is

Co-valency of "P" in PCl_(6)^(-) ion and "N" in NH_(4)^(+) ion respectively are

The oxidation number of nitrogen atom in NH_(4)NO_(3) are:

Given the molecular of the hexacoordinated complexes is : (1)CoCl_(3).6NH_(3)" "(2)CoCl_(3).5NH_(3)" "(3)CoCl_(3).4NH_(3) If the number of co-ordinated NH_(3) molecules in (1),(2) and (3) respectively are (6),(5) and (4) , the primary valency in (1),(2) and (3) are :