Question

What is the formula for calculating the number of electrons in each orbit?

Answer 1

The maximum number of electrons present in the each shell can be calculated by the following equation ,

Maximum number of electron in each shell = 2n^2

Where,

n – Shell number

For example if the shell number is 1 , the maximum number of electron present in the first ‘K ’ shell is 2(1)^2=2 .If the shell number is 2 , the maximum number of electron present in the second‘ L’ shell is 2 ( 2 )^ 2 = 8 .

If the atoms have 8 electrons in their outer most electron shell , atoms are more stable, and first electron shell is also more stable with two electrons.

Answer 2

Formula for calculating the number of electrons in a orbit ( e.g. K,L,M,N) 

is 2n²

For example if n = 1 

electrons = 2x1=2 

n = 2 

electrons = 8