Question

an element 'X' has same number of electrons in the first and the fourth shell as well as in the second and the third shell. (a) write down the electronic configuration of the element 'X'. (b) write down the group number and the period to which it belongs. (c) what is the valency of the element?​

Answer 1

Explanation:

Electronic configuration :- 2,8,8,2

Group :- 2

Period :- 4

Valency :- 2