NIST Atomic Spectroscopic Database
Ground States and Ionization Energies: Kr
Krypton, Z = 36
- Kr I
- Kr I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s24p6 1S0
- Ionization energy 112914.4 ± .03 cm-1
- References on
Energy Levels
- Kr II
- Br I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s24p5 2Pº3/2
- Ionization energy 196475.4 ± 1 cm-1
- References on
Energy Levels
- Kr III
- Se I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s24p4 3P2
- Ionization energy 298020 ± 100 cm-1
- References on
Energy Levels
- Kr IV
- As I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s24p3 4Sº3/2
- Ionization energy 423400 ± 1600 cm-1
- References on
Energy Levels
- Kr V
- Ge I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s24p2 3P0
- Ionization energy 521800 cm-1
- References on
Energy Levels,
Wavelengths
- Kr VI
- Ga I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s24p 2Pº1/2
- Ionization energy 633100 cm-1
- References on
Energy Levels,
Wavelengths
- Kr VII
- Zn I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s2 1S0
- Ionization energy 895300 cm-1
- References on
Energy Levels,
Wavelengths
- Kr VIII
- Cu I isoelectronic sequence
- Ground state 1s22s22p63s23p63d104s 2S1/2
- Ionization energy 1014665 cm-1
- References on
Energy Levels,
Wavelengths
- Kr IX
- Ni I isoelectronic sequence
- Ground state 1s22s22p63s23d10 1S0
- Ionization energy 1862900 cm-1
- References on
Energy Levels,
Wavelengths
- Kr X
- Co I isoelectronic sequence
- Ground state 1s22s22p63s23p63d9 2D5/2
- Ionization energy 2163000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XI
- Fe I isoelectronic sequence
- Ground state 1s22s22p63s23p63d8 3F4
- Ionization energy 2486000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XII
- Mn I isoelectronic sequence
- Ground state 1s22s22p63s23p63d7 4F9/2
- Ionization energy 2824000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XIII
- Cr I isoelectronic sequence
- Ground state 1s22s22p63s23p63d6 5D4
- Ionization energy 3153000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XIV
- V I isoelectronic sequence
- Ground state 1s22s22p63s23p63d5 6S5/2
- Ionization energy 3602000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XV
- Ti I isoelectronic sequence
- Ground state 1s22s22p63s23p63d4 5D0
- Ionization energy 3967000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XVI
- Sc I isoelectronic sequence
- Ground state 1s22s22p63s23p63d3 4F3/2
- Ionization energy 4361000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XVII
- Ca I isoelectronic sequence
- Ground state 1s22s22p63s23p63d2 3F2
- Ionization energy 4771000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XVIII
- K I isoelectronic sequence
- Ground state 1s22s22p63s23p63d 2D3/2
- Ionization energy 5170000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XIX
- Ar I isoelectronic sequence
- Ground state 1s22s22p63s23p6 1S0
- Ionization energy 6339000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XX
- Cl I isoelectronic sequence
- Ground state 1s22s22p63s23p5 2Pº3/2
- Ionization energy 6719000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXI
- S I isoelectronic sequence
- Ground state 1s22s22p63s23p4 3P2
- Ionization energy 7129000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXII
- P I isoelectronic sequence
- Ground state 1s22s22p63s23p3 4Sº3/2
- Ionization energy 7555000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXIII
- Si I isoelectronic sequence
- Ground state 1s22s22p63s23p2 3P0
- Ionization energy 8047000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXIV
- Al I isoelectronic sequence
- Ground state 1s22s22p63s23p 2Pº1/2
- Ionization energy 8476000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXV
- Mg I isoelectronic sequence
- Ground state 1s22s22p63s2 1S0
- Ionization energy 9287000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXVI
- Na I isoelectronic sequence
- Ground state 1s22s22p63s 2S1/2
- Ionization energy 9721300 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXVII
- Ne I isoelectronic sequence
- Ground state 1s22s22p6 1S0
- Ionization energy 23616000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXVIII
- F I isoelectronic sequence
- Ground state 1s22s22p5 2Pº3/2
- Ionization energy 24760000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXIX
- O I isoelectronic sequence
- Ground state 1s22s22p4 3P2
- Ionization energy 26030000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXX
- N I isoelectronic sequence
- Ground state 1s22s22p3 4Sº3/2
- Ionization energy 27270000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXXI
- C I isoelectronic sequence
- Ground state 1s22s22p2 3P0
- Ionization energy 28990000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXXII
- B I isoelectronic sequence
- Ground state 1s22s22p 2Pº1/2
- Ionization energy 30330000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXXIII
- Be I isoelectronic sequence
- Ground state 1s22s2 1S0
- Ionization energy 31990000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXXIV
- Li I isoelectronic sequence
- Ground state 1s22s 2S1/2
- Ionization energy 33137600 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXXV
- He I isoelectronic sequence
- Ground state 1s2 1S0
- Ionization energy 139511000 cm-1
- References on
Energy Levels,
Wavelengths
- Kr XXXVI
- H I isoelectronic sequence
- Ground state 1s 2S1/2
- Ionization energy 144665280 cm-1
- References on
Energy Levels,
Wavelengths
