Question

Electronic configuration of elements from 21 to 30 atomic no

Answer 1

21 -2,8,8,3

22 2,8,8,4

23 2,8,8,5

24 2,8,8,6

25 2,8,8,7

26 2,8,8,8

27 2,8,8,8,1

28 2,8,8,8,2

29 2,8,8,8,3

30 2,8,8,8,4