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