How Many Electrons Are In The First Shell Of An Atom?

There can be only 2electrons utmost in this shell
hydrogen have one electron in this shell
helium have 2electrons in this shell
let the no. Of shells be n
No. Of electrons = 2n²
here take example of shell no. 3
no. Of electrons in this shell = 2 (3)²
= 2 * 9
= 18

 the first shell always have 2 electrons except for a hydrogen atom.

43

All atoms have 2 electrons in the first shell except hydrogen

There can be only 2electrons utmost in this shell

No. Of electrons = 2n²
here take example of shell no. 3
no. Of electrons in this shell = 2 (3)² = 2 * 9

= 18

but as hydrogen has only 1 electron it has 1 electron in its outermost cell