Explain the term valency and variable valency . How are the elements with variable valency named ?
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Explanation:
- valency it is the fixed capacity of a atom for bonding
- whereas in case of variable valency it changes like like in d group compounds
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Certain elements have more than one valency. They exhibit variable valency. For example, copper, tin, iron and mercury exhibit variable valency. Copper combines with oxygen to form cuprous oxide (Cu2O) and cupric oxide (CuO).
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