Question

pl explain electronic configration according to class 9 in the form of k l m n​

Answer 1

Answer: number of valence electron in outer shell

Explanation:

number of electron in outer most shell due to which it can be classified as metal or non metal.

if it has 1,2,3 electron in outermost shell then it is metal otherwise it non- metal.

it is given by formula

=2(n)²

n= number of valence shell

Answer 2

Answer:

electronic configuration is the arrangement of electrons in shells

Explanation:

for the first 20 electrons :

k shell - can hold only 2 electrons

l shell - can hold 8 electrons

m shell- can hold 8 electrons

n shell - can hold 2 electrons

but elements beyond 20 electrons have the shells with the formula $2x^{2}$

where x = no. of shell

example k shell is the first shell

so, 2 ( 1 square)

which is 2

hope it is helpful!!