Question

atomic radius goes on decreasing while going from left to right give scientific reason

Answer 1

Atomic radius is generally decreases from left to right along a period because the electrons are added to same shell due to this they experience a great force from the nucleus. While atomic radius increases in group from top to bottom cause new shells are added and the electrons are bring away from the nucleus.

Answer 2

it is because the nuclear power which the protons are present acquires positive charge which shrinks the atom but the electrons are present in the same cell so from left to right the atomic radius goes on decreasing.