Internet Database of Periodic Tables
There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Dr Mark R Leach.
Use the buttons below to select from the 1000+ Periodic Tables in the database:
First Ionisation Energy of The Elements
Periodic trend for ionization energy, for example Mg → Mg+ + e–
Each period begins at a minimum for the alkali metals, and ends at a maximum for the noble gases. From Wikipedia:
Based on data from: Martin, W. C.; Wiese, W. L. (1996). Atomic, Molecular, & Optical Physics Handbook. American Institute of Physics. ISBN 156396242X.
© Mark R. Leach 1999-
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