Isotope Mass Abundance Spin Mag Moment
89Y 88.905849 100% 1/2 -0.1373
Y I Ground State 1s22s22p63s23p63d104s24p64d5s2 2D3/2 Ionization energy 50145.6 cm-1 (6.2173 eV) Ref. GRTE73,JS00 Y II Ground State 1s22s22p63s23p63d104s24p65s2 1S0 Ionization energy 98590 cm-1 (12.224 eV) Ref. NJK91