Atoms - The smallest part of an element, Nucleus - Found in the centre of an atom, Element - Made up of one type of atom only, Proton - Is positively charged, Neutron - Has no charge, Electron - Is negatively charged, The lightest subatomic particle - is the electron, Orbit or shell - is the name given to the path taken by the electron as it moves around the nucleus , Atomic number - tells the number of protons in an atom , Isotopes - atoms with the same atomic number but have a different atomic mass number , Stable atoms - the number of positive protons and a number of negative charge electrons are the same , Atomic mass number - tells the number of neutrons ,

The Atom

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