NIST Atomic Spectroscopic Database
Ground States and Ionization Energies: La
Lanthanum, Z = 57
- La I
- La I isoelectronic sequence
- Ground state [Kr] 4d105s25p65d6s2 2D3/2
- Ionization energy 44981 ± 5 cm-1
- References on
Energy Levels
- La II
- Ba I isoelectronic sequence
- Ground state [Kr] 4d105s25p65d2 3F2
- Ionization energy 89200 ± 80 cm-1
- References on
Energy Levels
- La III
- Cs I isoelectronic sequence
- Ground state [Kr] 4d105s25p65d 2D3/2
- Ionization energy 154675 ± 5 cm-1
- References on
Energy Levels
- La IV
- Xe I isoelectronic sequence
- Ground state [Kr] 4d105s25p6 1S0
- Ionization energy 402900 ± 500 cm-1
- References on
Energy Levels
- La V
- I I isoelectronic sequence
- Ground state [Kr] 4d105s25p5 2Pº3/2
- Ionization energy 497000 ± 5000 cm-1
- References on
Energy Levels
