What is the hybridization of phosphorous in a P4 molecule

Answer 1

what is the hybridizations of P4

Answer 2

sp^2

Answer 3

Sp3 , I don't know how because valency of P is 5 , so by V+M-C+A / 2. We get 5/2 ?? . So I think to accommodate 4 more electrons phosphorus sent its 3s1 to 4s and hybridised sp3

Answer 4

sp3