What is meant by atomic radius ? Explain why it decreases across a per – InterviewSolution

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1.	What is meant by atomic radius ? Explain why it decreases across a period ?
Answer» Solution :The distance from centre of nucleus to outermost shell of an atom is atomic radius. Atomic radius DECREASES across a period because electron is added in the same shell. So attraction between nucleus and VALENCE shell INCREASES due to which outermost shell is pulled in closer to the nucleus.

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