Sapling HW Q18

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Evonne Hsu 1J
Posts: 70
Joined: Wed Sep 30, 2020 9:35 pm

Sapling HW Q18

Postby Evonne Hsu 1J » Mon Oct 26, 2020 1:30 pm

Can someone please explain the answer to the order of the atomic radius? Thank you!
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Angel More
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Joined: Wed Sep 30, 2020 9:54 pm
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Re: Sapling HW Q18

Postby Angel More » Mon Oct 26, 2020 1:52 pm

The atomic radius of atoms generally decreases from left to right across a period.And increase from top to bottom. Check out the image I attached.
Also the gain of an electron adds more electrons to the outermost shell and the pull towards the nucleus so the pull becomes slightly weaker so it causes an increase in atomic radius.

With these 2 things in mind I think the order (from largest to smallest) is: Na, N, Mg, O, F. Do you agree?

I also think it could be Na, Mg, N O, F. The reason I put N before Mg is because Mg has less electrons so the pull to the nucleus would be stronger while N has more. At the same time Mg is lower and more towards the left.
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