Question

Atomic size decreases as we move along a period from left to right in the modern periodic table why

Answer 1

According to ChemWiki at UC Davis, "Atomic size gradually decreases from left to right across a period of elements. This is because, within a period or family of elements, all electrons are added to the same shell. As a result, the atomic radius decreases. Nuclear charge increases due to protons NOT electrons.

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Answer 2

Answer:this is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom

Explanation: