Isoelectronic Ionic Radius

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Grace Lee 3G
Posts: 19
Joined: Fri Sep 29, 2017 7:07 am

Isoelectronic Ionic Radius

Postby Grace Lee 3G » Sat Dec 09, 2017 11:05 pm

From the midterm practice test,

6. a) Arrange S2-, Cl-, and P3- in order of increasing ionic radius.

Since they all have the same number of electrons, wouldn't their radii be the same length?

Posts: 56
Joined: Sat Jul 22, 2017 3:00 am

Re: Isoelectronic Ionic Radius

Postby SantanaRodriguezDis1G » Sat Dec 09, 2017 11:13 pm

ionic radius are different because cations are smaller than their parents while anions are larger than their parents so you cant look at ionic radius as you do atomic radius. I hope this helps

Lourick Bustamante 1B
Posts: 50
Joined: Wed Nov 16, 2016 3:02 am

Re: Isoelectronic Ionic Radius

Postby Lourick Bustamante 1B » Sat Dec 09, 2017 11:14 pm

Each element has the same amount of electrons, but the amount of protons is not changing. Therefore, the elements with more protons have a stronger pull on the electrons making the atomic radius decrease.

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