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Determine the position of an element in ...

Determine the position of an element in long form of periodic table if its electronic configuration is `[""_(18)Ar]3d^(10)4s^(2)`.

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It is a d-block element. Hence its period no=principle quantum no. of the outermost shell=4 and its group no. =total electron in 3d and 4s-orbital=10+2=12.
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