■ Transition elements
► | Metals which are placed between Group 2 and Group 13 in Periodic Table of Elements.
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► | The physical and chemical properties of the elements are similar and do not change much across the period. |
► | not reactive or less reactive compare to alkali metals. | |
► | harder with higher melting and boiling point than the alkali metals. | |
► | shining surface, malleable, ductile, high tensile strength, | |
► | good conductors of heat and electricity. |
■ Coloured ions or compounds
► | They form ions, compounds and solution which are coloured.
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► | form complex ions which are coloured, such as
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► | All transition elements except scandium and zinc have more than one oxidation number. | |||||||||||||||||||||||
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■ Act as catalysts
► | Transition metals are good catalysts. A specific catalyst is used for a specific reaction, as in:
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⇲ For exercise(objective and subjective), download for free on Android OS. | ||
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