Ground States and Ionization Energies: Co

NIST Atomic Spectroscopic Database

Ground States and Ionization Energies: Co

Cobalt, Z = 27

Co I

Co I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁷4s² ⁴F_9/2

Ionization energy 63400 ± 500 cm^-¹

References on Energy Levels, Transition Probabilities

Co II

Fe I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁸ ³F₄

Ionization energy 137795 ± 10 cm^-¹

References on Energy Levels, Transition Probabilities

Co III

Mn I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁷ ⁴F_9/2

Ionization energy 270200 ± 500 cm^-¹

References on Energy Levels, Transition Probabilities

Co IV

Cr I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁶ ⁵D₄

Ionization energy 413500 ± 800 cm^-¹

References on Energy Levels, Transition Probabilities

Co V

V I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁵ ⁶S_5/2

Ionization energy 641000 ± 1600 cm^-¹

References on Energy Levels, Transition Probabilities

Co VI

Ti I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁴ ⁵D₀

Ionization energy 823000 ± 1600 cm^-¹

References on Energy Levels, Transition Probabilities

Co VII

Sc I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d³ ⁴F_3/2

Ionization energy 1040000 ± 2000 cm^-¹

References on Energy Levels, Transition Probabilities

Co VIII

Ca I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d² ³F₂

Ionization energy 1273000 ± 5000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co IX

K I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d ²D_3/2

Ionization energy 1501300 ± 2000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co X

Ar I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶ ¹S₀

Ionization energy 2221000 ± 3000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XI

Cl I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁵ ²Pº_3/2

Ionization energy 2460000 ± 16000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XII

S I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁴ ³P₂

Ionization energy 2710000 ± 7000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XIII

P I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p³ ⁴Sº_3/2

Ionization energy 3057000 ± 8000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XIV

Si I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p² ³P₀

Ionization energy 3315000 ± 16000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XV

Al I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p ²Pº_1/2

Ionization energy 3580000 ± 16000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XVI

Mg I isoelectronic sequence

Ground state 1s²2s²2p⁶3s² ¹S₀

Ionization energy 4129200 ± 500 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XVII

Na I isoelectronic sequence

Ground state 1s²2s²2p⁶3s ²S_1/2

Ionization energy 4408500 ± 300 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XVIII

Ne I isoelectronic sequence

Ground state 1s²2s²2p⁶ ¹S₀

Ionization energy 11269000 ± 4000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XIX

F I isoelectronic sequence

Ground state 1s²2s²2p⁵ ²Pº_3/2

Ionization energy 12135000 ± 10000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XX

O I isoelectronic sequence

Ground state 1s²2s²2p⁴ ³P₂

Ionization energy 12930000 ± 26000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XXI

N I isoelectronic sequence

Ground state 1s²2s²2p³ ⁴Sº_3/2

Ionization energy 13990000 ± 28000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XXII

C I isoelectronic sequence

Ground state 1s²2s²2p² ³P₀

Ionization energy 14890000 ± 30000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XXIII

B I isoelectronic sequence

Ground state 1s²2s²2p ²Pº_1/2

Ionization energy 15820000 ± 32000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XXIV

Be I isoelectronic sequence

Ground state 1s²2s² ¹S₀

Ionization energy 17090000 ± 34000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XXV

Li I isoelectronic sequence

Ground state 1s²2s ²S_1/2

Ionization energy 17897000 ± 5000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XXVI

He I isoelectronic sequence

Ground state 1s² ¹S₀

Ionization energy 76979000 ± 15000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Co XXVII

H I isoelectronic sequence

Ground state 1s ²S_1/2

Ionization energy 80753200 ± 400 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

NIST Physics Laboratory