Isotope Mass Abundance Spin Mag Moment
204Pb 203.973020 1.4% 0 206Pb 205.974440 24.1% 0 207Pb 206.975872 22.1% 1/2 +0.5926 208Pb 207.976627 52.4% 0
Pb I Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p21/2 (1/2,1/2)0 Ionization energy 59819.2 cm-1 (7.41663 eV) Ref. WA68 Pb II Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p 2P°1/2 Ionization energy 121245.14 cm-1 (15.03248 eV) Ref. RWS76