Question

Question 15
The electron distribution of an aluminium atom is

(a) 2, 8, 3
(b) 2, 8, 2
(c) 8, 2, 3
(d) 2, 3, 8

Answer 1

The answer is (a).
Aluminium atom has 13 protons and 13 electrons.
Therefore, Electronic configuration of ${}_{13}Al=2,8,3$