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A metal has electronic configuration `[Ar]^(18)3d^7 4s^2`.On the basis of this electronic configuration find out the group number.

Answer» Correct Answer - 9
Last electron enter in d-subshell so it belongs to d-block elements.
For d-block elements group number
=no of electrons in (n-1)d subshell+number of electrons in valence shell (i.e. ns)
=7+2=9


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