Chemistry
Map
Arrows point from what you learn first to what it opens.
- Proven to level123
- Open
- Locked
- Comes back deeper
Learning path
In the order the concepts build on each other.
- MatterReadyAnything that has mass and takes up space - from air and water to rock and you.
- AtomLockedThe smallest unit of an element - a tiny nucleus of protons and neutrons with electrons around it.Opens after: Matter
- States of matterLockedMatter is usually solid, liquid or gas - and heating or cooling moves it between them.Opens after: Matter
- ElementLockedA pure substance made of only one kind of atom, defined by its number of protons - like oxygen, iron or gold.Opens after: Atom
- MoleculeLockedTwo or more atoms held together - like O₂ or H₂O. A compound is a molecule made of different elements.Opens after: Atom
- Chemical bondLockedThe attraction that holds atoms together in molecules and solids - by sharing electrons (covalent) or transferring them (ionic).Opens after: Molecule
- Periodic tableLockedAll the elements arranged by atomic number, in rows and columns that group elements with similar behaviour.Opens after: Element
- Chemical reactionLockedA process where bonds break and new ones form, turning substances into different substances.Opens after: Chemical bond
- Conservation of massLockedIn a chemical reaction mass is neither created nor destroyed - the products weigh exactly what the reactants did.Opens after: Chemical reaction