What is variable valency ? Give two examples of elements showing variable valency.
Certain elements exhibit more than one valency, that means they show variable valency.
Ferrous is written as Iron (II) and Ferric is written as Iron (III).
|Iron||Ferrous [Iron (II)]
Ferric [Iron (III)]
|Copper||Cuprous [Copper (I)]
Cupric [Copper (II)]
Concept: Formulae of Compounds
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