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Federal
Periodic Table of the Elements: Atomic Properties
National Institute of Standards and Technology —
A periodic table, containing NIST critically-evaluated data on atomic properties of the elements [SP 966] was designed as a NIST handout for use at exhibitions and... -
Federal
NIST Atomic Energy Levels and Spectra Bibliographic Database
National Institute of Standards and Technology —
References contained in this database are from Bibliography on Atomic Energy Levels and Spectra, NBS Special Publication 363 and Supplements, as well as current... -
Federal
NIST Handbook of Basic Atomic Spectroscopic Data - SRD 108
National Institute of Standards and Technology —
This handbook provides a selection of the most important and frequently used atomic spectroscopic data in an easily accessible format. The compilation includes energy... -
Federal
NIST Ground Levels and Ionization Energies for the Neutral Atoms - SRD 111
National Institute of Standards and Technology —
Data for ground state electron configurations and ionization energies for the neutral atoms (Z = 1-104) including references. Version 2.0.