Question

pcl5 exist but NCl5 doesn't exist why

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Answer 1

Answer:

here phosphorus has vacant d orbital while N doesn't.

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Answer 2

Answer:

Phosphorus can form PCl5 since it has vacant d-orbitals in its valence shell. NCl5 is not possible because of no vacant d-orbitals.

Phosphorus can form PCl5 since it has vacant d-orbitals in its valence shell. NCl5 is not possible because of no vacant d-orbitals.