Identify and name the metal out of the following elements whose electronic configurations are given below.
(a) 2,8,2
(b) 2,8,1
(c) 2,8,7
(d) 2,1.

Explanation

(a) Magnesium (b) Sodium, (c ) Chlorine, (d) Lithium. (a), (b) and (d) are metals having 2 and 1 electrons in their valence shell.