P belongs to the V A group of the periodic table so its valance is 5 ( having 5 electrons around it). It combines with single valenced Cl atoms makes one single bond.When it combines with 3 Cl atoms forms 3 single bonds ie., 3 bonding pairs ( there is one lone pair on P). Solution P belongs to the V A group of the periodic table so its valance is 5 ( having 5 electrons around it). It combines with single valenced Cl atoms makes one single bond.When it combines with 3 Cl atoms forms 3 single bonds ie., 3 bonding pairs ( there is one lone pair on P)..