Question

why the atomic radios decreases on moving left to right along a period? give an example.(10th class)​

Answer 1

Answer:

The atomic radius of atoms generally decreases from left to right across a period. ... Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level. These electrons are gradually pulled closer to the nucleus because of its increased positive charge.

Answer 2

Explanation:

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.