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

1.	What is meant by atomic radius ? Explain why it decreases across a period ?
Answer» 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.

What is meant by atomic radius ? Explain why it decreases across a period ?

Answer»

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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What is meant by atomic radius ? Explain why it decreases across a period ?

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