Question

How does the atomic radius change moving from left to right and up to down why?

Answer 1

Explanation:

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

TREND - ATOMIC RADIUS

→ When we move from left to right , Atomic size decreases due to strong inter nuclear force .

→ When we move down the group , Atomic size increases as new shells are being added which provides shielding effect .