Ground States and Ionization Energies: Cr

NIST Atomic Spectroscopic Database

Ground States and Ionization Energies: Cr

Chromium, Z = 24

Cr I

Cr I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁵4s ⁷S₃

Ionization energy 54575.6 ± .3 cm^-¹

References on Energy Levels, Transition Probabilities

Cr II

V I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁵ ⁶S_5/2

Ionization energy 132966 ± 10 cm^-¹

References on Energy Levels, Transition Probabilities

Cr III

Ti I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d⁴ ⁵D₀

Ionization energy 249700 ± 200 cm^-¹

References on Energy Levels, Transition Probabilities

Cr IV

Sc I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d³ ⁴F_3/2

Ionization energy 396500 ± 400 cm^-¹

References on Energy Levels, Transition Probabilities

Cr V

Ca I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d² ³F₂

Ionization energy 560200 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr VI

K I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶3d ²D_3/2

Ionization energy 731020 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr VII

Ar I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁶ ¹S₀

Ionization energy 1291900 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr VIII

Cl I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁵ ²Pº_3/2

Ionization energy 1490000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr IX

S I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p⁴ ³P₂

Ionization energy 1688000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr X

P I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p³ ⁴Sº_3/2

Ionization energy 1971000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XI

Si I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p² ³P₀

Ionization energy 2184000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XII

Al I isoelectronic sequence

Ground state 1s²2s²2p⁶3s²3p ²Pº_1/2

Ionization energy 2404000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XIII

Mg I isoelectronic sequence

Ground state 1s²2s²2p⁶3s² ¹S₀

Ionization energy 2862000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XIV

Na I isoelectronic sequence

Ground state 1s²2s²2p⁶3s ²S_1/2

Ionization energy 3098520 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XV

Ne I isoelectronic sequence

Ground state 1s²2s²2p⁶ ¹S₀

Ionization energy 8151000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XVI

F I isoelectronic sequence

Ground state 1s²2s²2p⁵ ²Pº_3/2

Ionization energy 8850000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XVII

O I isoelectronic sequence

Ground state 1s²2s²2p⁴ ³P₂

Ionization energy 9560000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XVIII

N I isoelectronic sequence

Ground state 1s²2s²2p³ ⁴Sº_3/2

Ionization energy 10480000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XIX

C I isoelectronic sequence

Ground state 1s²2s²2p² ³P₀

Ionization energy 11260000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XX

B I isoelectronic sequence

Ground state 1s²2s²2p ²Pº_1/2

Ionization energy 12070000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XXI

Be I isoelectronic sequence

Ground state 1s²2s² ¹S₀

Ionization energy 13180000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XXII

Li I isoelectronic sequence

Ground state 1s²2s ²S_1/2

Ionization energy 13882000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XXIII

He I isoelectronic sequence

Ground state 1s² ¹S₀

Ionization energy 60344000 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

Cr XXIV

H I isoelectronic sequence

Ground state 1s ²S_1/2

Ionization energy 63675900 cm^-¹

References on Energy Levels, Wavelengths, Transition Probabilities

NIST Physics Laboratory