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Question Question 11
What is variable valency? Name two elements having variable valency and state their valencies.
Some elements exhibit more than one valency and they are said to have variable valency.
Examples: Iron and copper.
| Metal | Radicals | Valency |
|---|---|---|
| Iron (Fe) | Ferrous, Ferric | 2, 3 |
| Copper (Cu) | Cuprous, Cupric | 1, 2 |