5-3. Transition Elements

Question 1

Explain why two of the period 4 d block elements Zinc and Scandium are not transition metals.

Answer 1

(Transition element) has an ion with an incomplete/partiallyfilled
d sub-shell/d-orbital 
Scandium/Sc and zinc/Zn are not transition elements 
Electron configurations of ions
Sc3+ AND 1s2 2s2 2p6 3s2 3p6 
Zn2+ AND 1s2 2s2 2p6 3s2 3p6 3d10 
Sc3+ AND d sub-shell empty / d orbital(s) empty 
Note: Sc3+ must be the ONLY scandium ion shown for this
mark
Zn2+ AND d sub-shell full /ALL d-orbitals full 