Question

Why the formula of Copper Nitrate is Cu(No3)2 not CuNo3 even though it has two valencies 1 and 2????? Why only valency 2 is used??????​

Answer 1

This is because , only Cuprous can react with nitrate.

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Answer 2

Answer:it depends on number of electrons needed to maintain stability of compound.

Explanation:if compound is stable by getting 1 electron. if not stable 2 electron or given