Ionic radius

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Steven Garcia 1H
Posts: 79
Joined: Fri Sep 28, 2018 12:16 am

Ionic radius

Postby Steven Garcia 1H » Wed Oct 24, 2018 10:37 pm

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 ?

Hovik Mike Mkryan 2I
Posts: 95
Joined: Fri Sep 28, 2018 12:25 am

Re: Ionic radius

Postby Hovik Mike Mkryan 2I » Wed Oct 24, 2018 11:28 pm

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!

Emmaraf 1K
Posts: 94
Joined: Sat Oct 20, 2018 12:16 am

Re: Ionic radius

Postby Emmaraf 1K » Thu Oct 25, 2018 12:30 am

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.

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