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Maru [420]
3 years ago
15

Explain why atomic radius decreases as you move to the right across a period for main-group elements but not for transition elem

ents.
Chemistry
1 answer:
Korolek [52]3 years ago
5 0

Atomic radius decreases across a period because valence electrons are being added to the same energy level at the same time the nucleus is increasing in protons. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus.

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