Question

summarise the rules for writing of distribution of electrons in various shell for the first eighteen element

Answer 1

For distributing electron among shells

1. There are k,l,m,n shells

2. K shell need 2 valenced electrons

3. L shell need 8 valenced electrons

4. M shell need 8 valenced electrons

For example - Na (sodium) electronic configuration will be 2,8,1 i.e atomic number of sodium is 11 and it had fulfill its k and l shell.

Answer 2

_/\_Hello mate__here is your answer--

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The rules for writing of the distribution of electrons in various shells for the first eighteen elements are given below:

(1) The maximum number of electrons that a shell can hold is given by the formula '2n^2', where 'n' is the orbit number or energy level index (n = 1, 2, 3...).

The maximum number of electrons present in an orbit of n = 1 given by 2n^2 = 2 × 1^2 = 2 Similarly, for second orbit, it is 2n^2 = 2 × 2^2 = 8 For third orbit, it is 2n^2 = 2 × 3^2 = 18 And so on .....

(2) The outermost orbit can be hold by a maximum number of 8 electrons.

(3) Shells are filled with electrons in a step wise manner i.e., the outer shell is not occupied with electrons unless the inner shells are completely filled with electrons.

I hope, this will help you.☺

Thank you______❤

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