Question

Write the formulae and the valencies for the following radicals.

Phosphate, Ammonium, Carbonate, Oxide, Nitride, Sulphite

Answer 1

• The combining capacity of an element is known as its valency.
• The valency of an element is equal to the number of electrons an element loses, gains, or shares during a chemical bond formation

Radical	Formula	Valency
Phosphate	${\mathrm{PO}}_4^{3-}$	-3
Ammonium	${\mathrm{NH}}_4^{+}$	+1
Carbonate	${\mathrm{CO}}_3^{2-}$	-2
Oxide	${\mathrm{O}}_{}^{2-}$	-2
Nitride	${\mathrm{N}}_{}^{3-}$	-3
Sulphite	${\mathrm{SO}}_3^{2-}$	-2