Why Fe and Cu show Variable Valency | why Fe have +2 & +3 as valency | Variable Valency Explained

Why Fe and Cu show Variable Valency | why Fe have +2 & +3 as valency | Variable Valency Explained by Sourav Kr Jha


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what is variable valency,
why Fe and cu have two valency ,
why Fe have +2 and +3 as their valency,
why cu have variable valency,
variable valency concept,
variable valency in covalent bond,
variable valency in hindi,
variable valency of elements,
variable valency of copper


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