3.Atomic number of magnesium is 12.Number of electrons in M shell ofmagnesium will be
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There are 12 electrons in an atom of magnesium. K-shell contains 2 electrons and L-shell contains 8 electrons. Thus K and L-shell are full. Remaining 2 electrons (12-2-8 = 2) are accommodated in third or M-shell.
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above is correct Explaination of ur question ✌‼️
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