The elements in the middle section of the Periodic Table are the transition elements. They're all metals with typical metallic properties eg conducting heat and electricity. They often form coloured compounds.
Transition metal carbonates undergo thermal decomposition - a reaction in which a substance is broken down into at least two other substances by heat.
Transition metal hydroxides are insoluble in water. They can be precipitated out of a transitional metal compound solution using sodium hydroxide solution.
The transition elements are those in the middle section of the Periodic Table.
All the transition elements are metals and so they have typical metallic properties - they conduct heat and electricity, they are malleable and ductile and they form positive ions when they react with non-metals.
The compounds of transition metals are often coloured.
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