Question

What is valency of phosphorus 3 or5????

Answer 1

3......I think.......

Answer 2

It contains empty 3d orbitals sophosphorus can expand its octet by exciting on electron from 3s to 3d . Hence phosphorus can show valency 3 and 5 both. As it is a non metal , it tequire more 3 electrons to attain stable or noble configuration by forming ionic bound....

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