In ground state of phosphorus atom (Z = 15), the numbers of occupied sub-shells and occupied orbitals are respectively:

 Phosphorus atom  has atomic number , (Z = 15),  so its electronic configuration is$1{\mathrm{s}}^2,2{\mathrm{s}}^2,2{\mathrm{p}}_x^2,2{\mathrm{p}}_{\mathrm{y}}^2,2{\mathrm{p}}_{\mathrm{z}}^2,3{\mathrm{s}}^2,3{\mathrm{p}}_x^1,3{\mathrm{p}}_{\mathrm{y}}^1,3{\mathrm{p}}_{\mathrm{z}}^1$ . 

Hence, numbers of occupied sub-shells 5 and occupied orbitals 9.