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What Is an Ionic Radius? Definition and Trends

What Is an Ionic Radius? Definition and Trends: Ionic radius is half the distance between the nuclei of two ions that are just touching each other.

Periodic Table of Balloons demonstrates the periodic trends of atomic and ionic radius. (Blue: Atoms; Green: Cations; White: Anions). Lines made with blue painters' tape. (Nov 2011)


This shows some of the elements Ionic radius. Potassium is K. The Ionic radius is 133.


<p>In this interactive activity from the American Chemical Society, explore patterns in the periodic table. See how the electron configurations and properties of the elements vary according to their place in the table. Investigate the patterns by plotting and comparing the elements by molar mass, atomic radius, ionic radius, melting point, boiling point, electronegativity, and ionization energies.</p>


Mercury has 34 isotopes and the most common isotope is 202 Hg. The ionic radius of Mercury is 110 (+2e) 127 (+1e). It's electronegativity is 1.9.