Scandium forms no coloured ions, yet it is regarded as a transition elements. Explain why?

Scandium forms no coloured ions, yet it is regarded as a transition elements. Why ?

Explain the following : Scandium forms no coloured ions, yet it is regarded as a transition metal.

Explain the following: (a) Europium (II) is more stable than cerium (II) (b) Zr and Hf exhibit similar properties. ( c) Scandium forms no coloured ions, yet it is regarded as a transition metal.

Explain why zinc is not rgardede as a transition element.

Cu, Ag & Au are regarded as transition elements. Why?

The element scandium (Z=21) does not exhibit variable oxidation state and yet it is regarded as a transition element. Explain.

Explain the following observation : (i) Transition elements generally form coloured compounds. (ii) Zinc is not regaded as a transition element.