Question

why does phosphorus show variable valency ?

Answer 1

Since the valency of phosophorous is 3 but they can expand their valency , because of vacent d orbital. It should be 3 because phosphorus has 5 electrons in its valence shell. ... Therefore it accepts 3 electrons and completes its octet because accepting 3 electrons would be much easier than to donate 5 electrons.



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Answer 2

since the valency of phosphorus is 3 but they can expand their valency ,because of the vacent d orbital. it should be 3 because phosphorus has 5 electron in its valence shell.
therefore it accept 3 electron and complete its octet because accepting 3 electron would be much easier than to donate 5 electrons.
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