Topic 1: Atoms

  • Created by: plap101
  • Created on: 15-03-18 19:19
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  • Atoms
    • Contains protons, neutrons and electrons
    • Have no charge (neutral)
    • Protons are positive, neutrons are neutral, electrons are negative
    • Mass number = total number of protons and neutrons
    • Atomic number = number of protons
    • Nucleus
      • Contains protons and neutrons
      • Has a positive charge
      • Located in the middle of an atom
      • Has a radius of 0.1nm
    • Electrons
      • Negatively charged
      • Have no mass
      • Move around the nucleus in shells


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