Shielding r2R2 2p 2s 1s r2R2 probability of finding an electron on the sphere of radius r r An electron in the 2p orbital penetrates somewhat into the 1s orbital IV-8An electron in the 2p orbital penetrates somewhat into the 1s orbital Shielding r2R2 r2R2 = probability of finding an electron on the sphere of radius r 1s 2p 2s r IV-8