Covalency of Chlorine in ClO₄⁻
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+7 because covalency of oxygen is -2
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The atomic number of chlorine is 17. It contains one unpaired electron is p orbital along with s orbital electrons. Its outer electronic configuration can be given as ns2np5. Since it has empty d-orbital so e−s can go to excited state thus, chlorine has covalency of 7.
Explanation:
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