Chemistry

1Scandium is coloured in its compounds because Sc³⁺ has d electrons.

2The 4s electrons are removed before the 3d electrons when transition metals form ions.

3Transition metals can show more than one oxidation state.

4Transition metal compounds are often coloured because

5Transition metals are poor conductors of electricity.

6The catalyst used in the Contact process, V₂O₅, contains vanadium in the +___ oxidation state.

7The number of dative bonds to the central ion in a complex is its ___ number.

8Transition elements are d-block elements that

9A bidentate ligand

10When transition metals form ions, electrons are lost first from the