Ionic Radius

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Ionic Radius

Postby Catherine_Zhang_1H » Sun Oct 16, 2016 5:56 pm

How are ionic radii measured since they involve two different elements?

Posts: 22
Joined: Fri Jul 22, 2016 3:00 am

Re: Ionic Radius

Postby jonathanshi_1A » Sun Oct 16, 2016 7:30 pm

Hi Catherine,

I did some research because I was confused with the same concept.

What I found from a website said: Unlike a ball, an atom doesn't have a fixed radius. The radius of an atom can only be found by measuring the distance between the nuclei of two touching atoms, and then halving that distance. As you can see from the diagrams, the same atom could be found to have a different radius depending on what was around it.

Perhaps this method is more of an approximation rather than an accurate means of determining the radius? I hope this helped, and let me know if there is a different answer!

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Re: Ionic Radius

Postby Wang_Pong_Chan_1L » Sun Oct 16, 2016 9:39 pm

This applies to covalent bonds as well. Radii within a molecule is always measured by dividing the distance between the 2 nuclei in 2.

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