Chemistry
What everything is made of and how substances transform: from atoms to reactions.
Topics build on each other, but feel free to explore anywhere.
Substances & mixtures
5 topics · 50 exercises
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Atoms & elements
7 topics · 68 exercises
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Molecules & formulas
5 topics · 50 exercises
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Reactions
8 topics · 80 exercises
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Solutions, acids & bases
6 topics · 60 exercises
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Chemistry & everyday life
13 topics · 128 exercises
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1Air & its gases10 exercises2Water: a special substance10 exercises3Nitrogen & fertiliser10 exercises4Fermentation10 exercises5Chemistry in everyday life10 exercises6Plastics10 exercises7Resources & recycling10 exercises8Batteries10 exercises9Rust & corrosion protection10 exercises10Hydrogen: energy of the future?10 exercises11Alloys8 exercises12The chemistry of cooking10 exercises13Dyes & pigments10 exercises