Question

what are the valencies of iron ,nitrogen,copper and sulphur

Answer 1

HI Dear ....

The valencies are :
1. Iron : It has 2 valencies
Fe (II) = Ferrous = 2
Fe (III) = Ferric = 3

2. Copper
Cu (I) = Cuprous = 1
Cu (II) = Cupric = 2

3. Nitrogen = 3

4.Sulphur=2

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Answer 2

nitrogen =3
sulphur= 2
copper=2
iron = 2 and 3