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The 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: Mark R. Leach Ph.D.

Use the drop menus below to search & select from the more than 1300 Period Tables in the database: 

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Year:  1996 PT id = 238

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.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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