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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:  1976 PT id = 1306

Atomic & Ionic Radii Periodic Table

A periodic table showing atomic and ionic radii from Chem Libre Texts. The text says: Figure 3.7. Source: Ionic radius data from R. D. Shannon, "Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides," Acta Crystallographica 32, no. 5 (1976): 751–767.

Mark Leach writes:

"I came across this periodic table while researching an exam question with a student: Which ion is larger: Na+ or F?

"Note that N3–, O2–, F, Ne, Na+, Mg2+ & Al3+ are all isoelectronic in that they all have the same electronic configeration: 1s2, 2s2, 2p6. The only property that changes is the nuclear charge, which increases from + 7 to + 11.

"Thus, N3– will be the largest and Al3+ the smallest in this set of isoelectronic species as the increasing nuclear charge pulls the electrons closer. Likewise from P3– to Sc3+ which are all 1s2, 2s2, 2p6, 3s2, 3p6."

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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