Question

Why electron named k, l, m, n
Why not A B C D or.........

Answer 1

The names of the electron shells come from a fellow named Charles G. Barkla, a spectroscopist who studied the X-rays that are emitted by atoms when they are hit with high energy electrons. ... It is produced when an electron in the innermost shell is knocked free and then recaptured.

Answer 2

It is because they were decided by Charles G. And he named them according to him. He didn't want them in an alphabetical manner as he thought that they would end up soon.