1.

Sc (Z=21)is a transitionelementbut Zinc(Z=30)is notbecause

Answer»

both `Sc^(3+)` and `Zn^(2+)` ions are colourless and form white compounds
In case of Sc, 3D orbital are partially filled but in Zn these are completely filled
LAST electron as assumed to be ADDED to 4s level in case of zinc
both Sc and Zn do not exhibit variable oxidation states

Answer :B


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