- Atoms, Elements + Compounds
- All substances are made up of atoms
- There are about 100 different types of atom found naturally on Earth
- Some substances are made up of only one type of atom. We call these substances elements.
- There are only about 100 types of different elements
- Most of the substances we come across are not pure elements - they are made up of different types of atom joined together. These are called compounds.
- An atom is made up of a tiny central nucleus with electrons around it
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