Chemical reactions | KS3 Science

11.1

Chemical changes and equations

Physical and chemical changes, signs of a reaction, bonds breaking and forming, and balanced equations.

11.2

The fire triangle, what burning fuels make, metals gaining oxygen, and rusting.

11.3

Compounds that break down when they are heated: carbonates, limewater, and where the mass goes.

11.4

A more reactive metal pushes a less reactive one out of its compound.

11.5

Speeding up reactions without being used up: in the lab, in cars and in your body.

Five quick diagram questions a day from this unit. The ones you get wrong come back sooner. Progress saves in this browser.

Mapped to the KS3 national curriculum (Chemistry: chemical reactions; materials).

Programme of study	Lesson
chemical reactions as the rearrangement of atoms	11.1
representing chemical reactions using formulae and using equations	11.1, and in every lesson
combustion, thermal decomposition, oxidation and displacement reactions	11.2, 11.3, 11.4
what catalysts do	11.5
the order of metals and carbon in the reactivity series; the use of carbon in obtaining metals from metal oxides	11.4

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