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Thermal Stability of Carbonates

When group 2 carbonates are heated they decompose into the oxides and carbon dioxide with increasing difficulty down the group.The smaller the positive ion is, the higher the charge density, and the greater the polarising effect it will have on the carbonate ion.

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Specification: Edexcel Chemistry (8CH0), AS-level, Topic 4A: The elements of Groups 1 and 2. Topic: Group 2.

Key terms in this lesson

charge density: The charge on an ion divided by its size, greater for smaller ions carrying a bigger charge.

More in Group 2

All 16 lessons in Group 2 · All Edexcel AS-level Chemistry topics