Hydrogen (H)
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Atomic Data for Hydrogen (H)
Atomic Number = 1
Atomic Weight = 1.00794
Reference E95
Isotope Mass Abundance Spin Mag Moment
1H 1.007825 99.985% 1/2 +2.79284
2H 2.0140 0.015% 1 +0.85743
Notes:
The wavelengths and energy levels given below are for the isotope 1H.
Although the tabulated energy levels comprise values for each level through n = 5,
we give (Ritz) wavelengths for resolved fine structures only for the Lyman-alpha,
Balmer-alpha, and Balmer-beta lines (1215, 6562, and 4861 Å). As indicated by the
energy-level notations in the persistent-lines table, the other wavelengths represent
unresolved multiplets. These wavelengths are from the corresponding weighted-average
energies.
H I Ground State 1s 2S1/2
Ionization energy 109678.7717 cm-1 (13.598433 eV) Ref. MK00a