How many unpaired electrons does phosphorus have in its 3p sub level?

Answer 1

3. Orbitals are filled one electron at a time, putt ting electrons into the lowest energy orbitals first. When there are degenerate orbitals ( having the same energy e.g. p and d orbitals) they tale one un paired electron each first and then and then any extra electrons are added into a half filled orbital to make a spin pair. P has a configuration of [Ne] 3s2 3p3 and there are only three p orbitals ( at any energy level)