Nucleus, Positively charged core of the atom, Electron Cloud, location of electrons within energy levels, Proton, positive charge, mass of 1, proton and neutron, proton and neutron, located in the nucleus, changes with different isotopes of an atom, mass number, neutron, has no charge, symbol of particle which identifies the atom, p+, symbol of particle which has a mass of 1 amu and no charge, n 0, symbol of particle which is not in the nucleus, e -, ion, an atom that has lost or gained electrons, isotope, atoms which have different mass numbers but have the same atomic number, average atomic mass, the isotopic masses multiplied by their relative abundances and added together, symbol notation, has mass number, atomic number and charge surrounding element symbol, hyphen notation, The element symbol followed by the mass number, 26, the atomic number of iron, 30, the number of neutrons in iron-56

Subatomic Particles

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