Assertion (A): Atomic radius tends to decrease across a period.Reason (R): As we move from left to right along a period, the valence electrons are added to the same shell, nuclear charge increases and atomic radius decreases.

Assertion (A): Atomic radius tends to decrease across a period.Reason

1.	Assertion (A): Atomic radius tends to decrease across a period.Reason (R): As we move from left to right along a period, the valence electrons are added to the same shell, nuclear charge increases and atomic radius decreases.
Answer» Both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A). Both (A) and (R) are correct but (R) is not the correct explanation of (A). (A) is correct but (R) is WRONG. (A) is wrong but (R) is correct. ANSWER :a