0. 0. 3s2 3p6 1S 3p6 1S 0. @ 469310. 3s2 3p5 3d 3P 3p5 3d 3P 1. @ 472950. 3s2 3p5 3d 3P 3p5 3d 3P 2. @ 480770. 3s2 3p5 3d 3P 3p5 3d 3P 4. @ 493060. 3s2 3p5 3d 3F 3p5 3d 3F 3. @ 496950. 3s2 3p5 3d 3F 3p5 3d 3F 3. @ 527220. 3s2 3p5 3d 3D 3p5 3d 3D 1. @ 534810. 3s2 3p5 3d 3D 3p5 3d 3D 2. @ 539070. 3s2 3p5 3d 3D 3p5 3d 3D 2. @ 530050. 3s2 3p5 3d 1D 3p5 3d 1D 3. @ 543040. 3s2 3p5 3d 1F 3p5 3d 1F 1. @ 673850. 3s2 3p5 3d 1P 3p5 3d 1P 1. @ 1269940. 3s2 3p5 4s 3P 3p5 4s 3P 1. @ 1292110. 3s2 3p5 4s 1P 3p5 4s 1P 1. @ 1571310. 3s2 3p5 4d 3P 3p5 4d 3P 1. @ 1594130. 3s2 3p5 4d 1P 3p5 4d 1P 1. 1701800. 3s2 3p5(2P1)4f 2[1+] 1)4f 2[1+] 2. 1704300. 3s2 3p5(2P1)4f 2[1+] 1)4f 2[1+] 5. 1706400. 3s2 3p5(2P1)4f 2[4+] 1)4f 2[4+] 4. 1708600. 3s2 3p5(2P1)4f 2[4+] 1)4f 2[4+] 3. 1708300. 3s2 3p5(2P1)4f 2[2+] 1)4f 2[2+] 4. 1716400. 3s2 3p5(2P1)4f 2[3+] 1)4f 2[3+] 3. 1732900. 3s2 3p5(2P0)4f 2[2+] 0)4f 2[2+] 2. 1739400. 3s2 3p5(2P0)4f 2[2+] 0)4f 2[2+] 3. 1736000. 3s2 3p5(2P0)4f 2[3+] 0)4f 2[3+] 4. 1736400. 3s2 3p5(2P0)4f 2[3+] 0)4f 2[3+]