Question

what are the maximum number of electrons present in-first shell,second shell,third shell,fourth shell aandvalence shell of an atom?

Answer 1

The maximum of electrons present in the different shells is given by the formula 2n² where n is the shell number.
The maximum number of electrons in the different shells are:

1. First or K shell - 2
2. Second or L shell - 8
3. Third or M shell - 18
4. Fourth or N shell - 32

Valence shell is the outermost shell of an atom and number of electrons present in it depends on the element.