Question

element a with electronic configuration 2 8 2 lies in which period and which group​

Answer 1

Answer:

Element with electronic configuration 2,8,2 belongs to 3rd period and 2nd group. The valence electrons give us the idea of group number. As the electrons are divided into 3 different shell therefore period number is 3.

Explanation:

this is a correct answer

Answer 2

Answer:

the element have electronic configuration 282 is