Practice question
Question
What is the minimum number of electrons required to fill the M shell completely?
Explanation
The M shell (n = 3) has a maximum capacity of 2n² = 2 × 3² = 18 electrons, assuming all subshells (3s, 3p, 3d) are filled. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Discussion
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