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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