Question

why atomic radius decreases in moving from left to right along a period?​

Answer 1

Answer:

Atomic Radius to right in a radius decreases while going to left to right in a period.This is because when we move left to right in a period atomic number increases thus the valence electron feels more attraction towards the nucleus.thus size deceases.

Also effective nuclear charge increases due to which size decreases

Explanation:

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Answer 2

This is because when we move left to right in a period atomic number increases thus the valence electron feels more attraction towards the nucleus thus size of radius deceases.

Also effective nuclear charge increases due to which size decreases.