An atom of an elements has two electrons in outermost M shell state its
(a) Electronic configuration (b) number of protons (c ) atomic number
(d) nature whether metal or non metal
(e ) valency

Explanation

(a) since the atom has two electrons in outermost M lshell this means that K and L shells are already filled .
Therefore electronic configuration is 2(K)8(L)2(M)
(b) Number of protons =Number of electrons =12
(c ) Atomic number = Number of proton s=12
(d) The element with two valence electrons is a metal
(e ) valency of the elemebnt = Number of outermost electrons =2
(f) The element is mechanesium (Mg)