How does atomic size change within groups and across periods?

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Duckling

Chemistry

23 July, 19:08

How does atomic size change within groups and across periods?

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Karter Harvey · Answer 1

Atomic size decreases along a period because of the nuclear charge increasing, this means that the electrons are more attracted to the nucleus, which decreases the size.

Atomic size increases down a group because the number of electron shells is greater each time, meaning that the electrons are less attracted to the nucleus.