Write the valency of 'Fe' in `FeCl_3` (AS-1)

Write the valencies of Fe in FeCl_2 and FeCl_3 .

Write the valency of carbon in CH_3 - CH_3 , CH_2 = CH_2 and HC ~=CH ?

The valency of nitrogen in NH_3 is

1) what is the valency of Na ?

The primary valency of 'Fe' in the complex K_(4)[Fe(CN)_(6)] is

""_(5 ) ""_(6 ) C ,""_(7 ) N , ""_(8 ) O ,""_(9 ) Fe .""_(10 ) Ne are in a period in the periodic table . what are the valencies of the given elements ?

The primary valency of Iron in K_(4)[Fe(CN)_(6)] is satisfied by

Write on the valency, bonding and catenation of sulphur.

Which of the following change the colour of aqueous solution of FeCl_(3) ?