Answer:
complex ions that would be colorless include
(i) scandium iii
(ii) zinc ii
Complex ions with color include
Copper ii
Iron ii
Iron iii etc
Explanation:
Scandium iii and zinc ii are colorless complexes because its 3d level is empty the are sometimes not regarded as a transition element. WHILE
Complex ions containing transition metals are usually coloured this is because of the partly field orbitals which is involved in generating the color in some ways.
