Mg2+ and F-

JamieVu_2C
Posts: 108
Joined: Thu Jul 25, 2019 12:16 am

Mg2+ and F-

How does Mg2+ have a larger radius than F- when F- has a greater effective nuclear charge since it is further to the right on the periodic table and when Mg2+ is in a higher energy shell?

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
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Re: Mg2+ and F-

You’ve answered your question in your own post; Mg is lower in the periodic table and thus larger, using one more electron shell than fluorine. This is the case for the ions as well