Question

define electronic configuration​

Answer 1

______________


$\huge\text{\underline{Electronic\:configuration:}}$


It tells about the arrangement of electron around the $\bold{\underline{nucleus\:in\:an\:atom.}}$


$\bold{\underline{Electrons}}$ are filled according to increasing order of energy level.


$\sf{\underline{NOTE:}}$


⚫The energy level are denoted as K, L, M.etc.


⚫The first energy level can accommodate only 2 electrons.


⚫2nd and 3rd energy level can accommodate 8 electrons.


______________

Answer 2

Answer:

Explanation:

As we know the formula for arranging the electrons in the electronic configuration.

=> 2n² .

And the names of the cells are K, L, M, N and so on .

So ,

In K = 2n² = 2(1)² = 2

In L = 2n² = 2(2)² = 8

In M = 2n² = 2(3)² = 18

In N = 2n² = 2(4)² = 32

In 0 = 2n² = 2(5)² = 50

So the electronic configuration of the element Having atomic number 100, is = 1 .

And the valency = 1

Valency = Number of Valence electrons in an element.