.5 0. 1s 2S 1s 2S .5 [60511117. ] 2s 2S 2s 2S .5 [71778280. ] 3s 2S 3s 2S .5 [75713932. ] 4s 2S 4s 2S .5 [77532202. ] 5s 2S 5s 2S 1.5 [71835656. ] 3d 2D 3d 2D 1.5 [75738114. ] 4d 2D 4d 2D 1.5 [77544571. ] 5d 2D 5d 2D 2.5 [71855000. ] 3d 2D 3d 2D 2.5 [75746281. ] 4d 2D 4d 2D 2.5 [77548753. ] 5d 2D 5d 2D 3.5 [77550825. ] 5g 2G 5g 2G 4.5 [77552072. ] 5g 2G 5g 2G