What is the atomic number of the element with $M^{2+}$ ion having electronic configuration $[Ar]3d^8$?
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$E.C$ of $M : [Ar]4s^23d^8E.C$ of $M^{2+ }: [Ar]4s^03d^8$
Total electrons $= 28 =$ atomic number.
Total electrons $= 28 =$ atomic number.
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