Question

. Li Na k Be
(Increasing order of their size)

Answer 1

answer:

1. K
2. Na
3. Be
4. Li

Explaination:

Electronic configuration:-

• Li= 2,1
• Na= 2,8,1
• K= 2,8,8,1
• Be= 2,2

as the no. of electrons increases, size of atom decreases