NIST Atomic Spectroscopic Database
Ground States and Ionization Energies: O
Oxygen
,
Z
= 8
O II
N I isoelectronic sequence
Ground state 1
s
2
2
s
2
2
p
3
4
Sº
3/2
Ionization energy 283270.9 ± 0.5 cm
-
1
References on
Energy Levels,
Wavelengths
