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Nitrogen and Phosphorus are in the same group. PCI5 is known but NCI5 is not known. Why?

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Nitrogen and Phosphorus are in the same group. PCI5 is known but NCI5 is not known. Why?

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In phosphorus vacant d-orbitals are present. It can form pentahalides. But due to absence of d-orbitals nitrogen cannot form NCI5.

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