Sc (Z = 21) is a transition element but Zn(Z = 30) is not because

Options

A. Both `Sc^(3+)` and `Zn^(2+)` ions are colourless and form white compounds
B. In case of Sc, 3d orbitals are partially filled but in Zn these are filled
C. Last electron is assumed to be added to 4s level in case of Zn
D. Both Sc and Zn do not exhibit variable oxidation states

Answer

B