properties of transition metals
variable oxidation states
formation of brightly coloured compounds
catalysts
Examples using 2 transition metals of variable oxidation states and their colours
Fe(ii) FeCl2
Fe(iii) FeCl3
Cr(iii)
Cr(vi)
Examples using 2 transition metals of catalysts
Iron in the haber process
Nickle in hydrogenation of vegetable fats to make margarine
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