How many valence electrons does phosphorus have?

Phosphorous is a waxy red or white coloured element. Since it is a highly reactive element, it is never found free in nature and is mostly found in the oxidized state in phosphate rocks. Phosphorous shows valencies of both 3 and 5. It depends upon the electronic configuration of the atom. In case there are 3 unpaired electrons in its three p orbitals, it has a valency of 3.

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