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Question
Q228) In the ground state, an element has 13 electrons in its M-shell. The element is



SOLUTION

M shell means 3rd orbit Mn = 25 = 1s2 , 2s2 , 2p6 , 3s2 , 3p6 , 4s2 , 3d5 3s, 3p and 3d have total 18 electrons
Answer:(a)