Question

Why we can not fill more than 8 electron in M shell​

Answer 1

Answer:

The shells of an atom cannot accommodate more than 8 electrons, even if it has a capacity to accommodate more electrons. This is a very important rule called the Octet rule. According to this rule, atoms gain, loose or share electrons to achieve the stable configuration similar to the nearest noble gas.

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Answer 2

Answer:

This is because of the fact that electrons are filled in shells in the increasing order of energy. ... And hence electrons begin to occupy the m-shell only in the elements with atomic number 11 - 18. And since the element with atomic number 18 has only 8 electrons left, these 8 electrons occupy the m-shell.

Explanation:

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