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Question

Maximum number of electrons present in M shell is:

(A) 2
(B) 18
(C) 32
(D) 9
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Solution

The correct answer is (b) 18 electrons.
  • The maximum number of electrons that can be accommodated in an energy level is 2n² (n = number of its orbit, for K=1, L=2, M=3).
  • So, M shell can accomodate = 2 x (3)² = 18 electrons.

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