\( \operatorname{Sc}(Z=21) \) is a transition element but \( \mathrm{Zn}(Z=30) \) is not because...

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\( \operatorname{Sc}(Z=21) \) is a transition element but \( \mathrm{Zn}(Z=30) \) is not because: (Karnataka NEET 2013)
(a) both \( \mathrm{Sc}^{3+} \) and \( \mathrm{Zn}^{2+} \) ions are colourless and form white compounds.
\( P \)
(b) in case of Sc, \( 3 d \)-orbitals are partially filled but in \( \mathrm{Zn} \) these are completely filled.
W.
(c) last electron is assumed to be added to \( 4 s \) level in case of \( \mathrm{Zn} \).
(d) both Sc and Zn do not exhibit variable oxidation states.
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