.5 0. 1s 2S 1s 2S .5 [33071743. ] 2s 2S 2s 2S .5 [39214580. ] 3s 2S 3s 2S .5 [41362270. ] 4s 2S 4s 2S .5 [42355346. ] 5s 2S 5s 2S 1.5 [39231576. ] 3d 2D 3d 2D 1.5 [41369436. ] 4d 2D 4d 2D 1.5 [42359013. ] 5d 2D 5d 2D 2.5 [39237382. ] 3d 2D 3d 2D 2.5 [41371887. ] 4d 2D 4d 2D 2.5 [42360268. ] 5d 2D 5d 2D 3.5 [42360890. ] 5g 2G 5g 2G 4.5 [42361265. ] 5g 2G 5g 2G