Statement-I: Radii of 1s, 2s and 2p subshells are in the order 1s < 2p < 2s.Statement-II: Energies of 1s, 2s and 2p subshells are in the order 1s < 2s < 2p.

(1) Because of spherical shape of  ‘ 2s’  It is large in size when compared with  ‘2P'  Hence the order of radii is  1s < 2p< 2s(2) Energy of orbitals based on (n+l) rule ; As (n+l) value increases energy increases , If (n+l) is same then energy depends on  ‘n’ value.     Hence the order of energies is  1s < 2s < 2p