Electronic configuration of an element ICSE CHEMISTRY - Video class

How to learn Electronic configuration of an element ICSE CHEMISTRY class 10

What is meant by Electronic configuration of an element?

The distribution of electrons into the electron shells in an atom of an element is called Electronic configuration of that element.

In an atom of an element the electrons revolve around the nucleus in imaginary circular orbits called Electron Shells. There shells are labelled with K,L,M,N,..... or 1,2,3,4,....

The maximum number of electrons that can be accommodated in a shell can be found with the formula 2n^2

Hence the maximum number of electrons in each of the shell will be like 

K-2

L-8

M-18

N-32

RULES FOR DISTRIBUTION OF ELECTRONS IN THE SHELLS

1. The shell closest to the nucleus has to be filled first. Means you have fill K first, then L, M,....

2. No element can have more than 8 electrons in its outermost shell ( Valence shell)

Here this video explains How to write Electronic configuration of the first 18 elements..

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