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Grade: 12

                        

Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

2 months ago

Answers : (1)

Anand Kumar Pandey
askIITians Faculty
4452 Points
							Dear Student

The rules for writing of distribution of electrons in various shells for the first eighteen elements are:
(i) The maximum number of electrons present in a shell is formula—2n^2
n = orbit number i.e., 1, 2, 3
Maximum number of electrons in different shells are:
K shell n = 1 2n^2⇒ 2(1)^2= 2
L shell n = 2 2n^2⇒ 2(2)^2= 8
M shell n = 3 2n^2⇒ 2(3)^2= 18
N shell n = 4 2n^2⇒ 2(4)^2= 32
(ii) The maximum number of electrons that can be accommodated in the outermost orbit is 8.
(iii) Electrons are not accommodated in a given shell unless the inner shells are filled. (Shells are filled step-wise).

Thanks
2 months ago
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