Question

how many electron in outer most shell ​

Answer 1

Answer:

The outermost shell in an atom cannot have more than eight electrons even if it has a capacity to take up more electrons. This is also called the octet rule. Protons and neutrons have nearly same mass(one unit). Electrons have negligible mass

Answer 2

Answer:

Your answer is here:-

Explanation:

It depends on what the element is, like in

Helium - 2

Aluminum - 3

etc.

Hope it helps you.