Iron(II) ions are capable of being oxidised to iron(III) ions by hydrogen peroxide. Which statement explains why iron is classed as a transition element?
- AIron is a transition element because it can be oxidised.
- BIron is a transition element because it has variable oxidation states.
- CIron is a transition element because it takes part in redox reactions.
- DIron is a transition element because it reacts with chlorine.