# Why V can't have the valence 7 by taking an electron from the 3p orbital and putting it into 3d?

Does that happen because 3p already has a bond?

• Vanadium has a valency of 5 to start with, so transferring an electron from a 3p orbital into a 3d orbital would lead to a valency of 6 not 7. – Philipp Nov 23 '14 at 13:59

Electrons cannot be transferred from $3p$ orbital to $3d$ orbital as the $3p$ orbital is completely filled and has attained stability.
It requires high energy so as to transfer electrons from $3p$ orbital to $3d$ orbital.