What is the maximum number of electrons that the third orbit or M-shell can have?

Explanation

The correct answer is 18. Key Points The maximum number of electrons that can be accommodated in the M shell of an atom is 18. The shell corresponds to the principal quantum numbers. For the M shell principle, the quantum number is 3. So, the maximum number of electrons present in the M shell is 18. The shell number is expressed by the formula 2n2, where n is the number of shells. The shells, values of n, and the total number of electrons can be accommodated. Additional Information Each subshell is constrained to hold 4ℓ + 2 electrons at most, namely: Each s subshell holds at most 2 electrons Each p subshell holds at most 6 electrons Each d subshell holds at most 10 electrons Each f subshell holds at most 14 electrons Each g subshell holds at most 18 electrons