Transition Elements

Transition Elements

Ø  Elements that is located in Group 3 to Group 12 in the Periodic Table.

Ø  Examples: scandium, iron, nickel, tungsten and copper

Physical  Properties:

§  Solid

§  Shiny surface

§  Ductile and malleable

§  Good conductor of heat and electricity.

§  High density.

§  High melting point and boiling point.

Special characteristics

v  Show different oxidation numbers in their compounds.

v  Form coloured ions or compounds.

v  Act as catalyst.

v  Form complex ions.

•          These characteristics are not possessed by other metals.

Ions	Colour of aqueous solution
Fe2+	Green
Fe3+	Yellow/ brownish yellow/ brown
Mn2+	Pink
MnO4-	Purple
Cr2O72-	Orange
CrO42-	Yellow

The Uses Of Transition Metals In Industries

Process	Manufacture	Catalyst
Contact Process	Sulphuric acid, H2SO4	Vanadium oxide, V2O5
Ostwald process	Nitric acid, HNO3	Platinum
Haber process	Ammonia, NH3	Iron
	Margarine	Nickel