Atom - The smallest part of an element that can still be recognised as that element, Element - A substance made up of only 1 type of atom which cannot be broken down chemically into any simpler substances., Compound - A substance made when two or more elements are chemically bonded together., Electron - A tiny particle with a negative charge which orbits the nucleus in atoms or ions., Neutron - A subatomic particle that has no charge and that is found in the nucleus of an atom., Proton - A subatomic particle that has a positive charge and that is found in the nucleus of an atom., Nucleus - The positively charged dense centre of an atom., Shells - A group of electrons in an atom that orbit at roughly the same distance from the nucleus.,

KS4 Chemistry Atoms elements compounds

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