Can the outermost shell in an atom have more than 8 electrons?

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Solution

In the outermost orbit of an atom, the highest number of electrons that can be accommodated is 8.
Even though an atom's outermost shell has the capacity to accept extra electrons, it cannot contain more than eight to maintain stability.
This rule is known as the “octet rule”.
The formula $2 n^{2}$ gives the maximum number of electrons that may be accommodated in a particular shell, where n is the principal quantum number.
No, the outermost shell in an atom cannot have more than 8 electrons.

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