An element 'A' has mass number 23 and atomic number 11. State the —

(i) no. of neutrons in it's shell,
(ii) electronic configuration of the element 'A'.

Given, mass number 23 and atomic number 11. So, Protons (P) = 11 and

(i) Neutrons (n) = A - P = 23 - 11 = 12

(ii) As number of electrons (e) = 11

∴ Electronic configuration of A = 2, 8, 1