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Revision:The Typical Characteristics of Transition MetalsTSR Wiki > Study Help > Subjects and Revision > Revision Notes > Chemistry > The Typical Characteristics of Transition Metals
High Melting Point and Boiling PointThe bonding between the atoms in transition metals is very strong. The strong attractive force between the atoms is only weakened at high temperatures, hence the high melting points and boiling points. For example: iron melts at 1535°C and boils at 2750°C BUT a Group 1 Alkali Metals such as sodium melts at 98°C and boils at 883°C.
High densityAnother consequence of the strong bonding between the atoms in transition metals is they are tightly held together to give a high density. For example: iron has a density of 7.9 g/cm3 and sodium has a density of 0.97 g/cm3 (and floats on water while fizzing! water has a density of 1.0 g/cm3).
Form coloured compounds and ions in solutionTransition metals tend to form more coloured compounds more than other elements either in solid form or dissolved in a solvent. The colours of some transition metal salts in aqueous solution are shown below:
Diagrams/pictures/colours missing.
Catalytic PropertiesThe metallic elements themselvesMany transition metals are used directly as catalysts in industrial chemical processes and in the anti-pollution catalytic converters in car exhausts. For example iron is used in the Haber Synthesis of ammonia: or
The compounds of transition metalsAs well as the metals, the compounds of transition metals also acts as catalysts. For example manganese dioxide (or manganese(IV) oxide), MnO2, a black powder, readily decomposes an aqueous solution of hydrogen peroxide: Hydrogen peroxide or
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