Question

answer plz zzzzzzzzzzzzzzzzzzzz​

Answer 1

Atomic number of b is 13

A has greater atomic size because atomic size increases down a group as shells are added upon.

B has lower atomic size because atomic size decreases along a period as nuclear charge increases along a period

Answer 2

Hey mate here is your answer.


B)Al

A) 'a'is greater than be because Na is lesser than K, so the 'a' the atomic size is greater then 'b'