If the electronic configuration of an atom $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6}, 4 s^{2}$ the atomic number of the atom is-

Question

If the electronic configuration of an atom 1-s-2- 2-s-2-2-p-6- 3-s-2-3-p-6- 4-s-2- the atomic number of the atom is-201828

Toppr Admin · Accepted Answer

The total no of electrons present in s and p subshell-2-2-6-2-6-2-20

If the electronic configuration of an atom $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6}, 4 s^{2}$ the atomic number of the atom is-
$20$
$18$
$2$
$8$