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Ionic radius

Posted: Wed Oct 24, 2018 10:37 pm
by Steven Garcia 1H
If two or more elements are isoelectronic (that is they have the same electron configuration), how do you determine which element has the smallest or largest ionic radius ?

Re: Ionic radius

Posted: Wed Oct 24, 2018 11:28 pm
by Hovik Mike Mkryan 2I
Hello, I usually consider the same reasoning for any type of radius for atoms. The trends I have noticed is that as you go down a group the radius increases. As you go from right to left in a period the radius increases. Also, radius increases as you go from the top right corner to the bottom left. Hope this helps!

Re: Ionic radius

Posted: Thu Oct 25, 2018 12:30 am
by Emmaraf 1K
Look at the nuclear charge of the isoelectric anions/cations/atoms. The higher the nuclear charge, the smaller the atom/cation/anion will be because the electrons will have a stronger pull inward thereby making the radius smaller.