Question

Assertion : Atomic size of elements decreases down the group. (1) Reason: Number of shells increases down the group. a)Both assertion and reason are true and reason is the correct explanation of assertion. b)Both assertion and reason are true but reason is not the correct explanation of assertion. c)Assertion is true but the reason is false. d)Assertion is false but the reason is true. ​

Answer 1

Answer:

bcoz the atomic mass of the number is given at the question also mass us contain with the atom

Answer 2

Answer:

(d)

Explanation:

Atomic size increases down the group as number of valence shells increases down the group.