What is variable valency ? Give two examples of elements showing variable valency.

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2 Answers

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).

Metal Radicals Radicals Valency
Iron Ferrous [Iron (II)]
Ferric [Iron (III)]
2
3
Copper Cuprous [Copper (I)]
Cupric [Copper (II)]
1
2

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There are some elements with more than one valency. They are said to have variable valency, e.g. Iron, copper.

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