atoms and elements

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GCSE Science Mindmap am atoms and elements, erstellt von c.kennedy am 25/03/2015.
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Zusammenfassung der Ressource

atoms and elements
  1. the nucleus
    1. the nucleus is really small compared to the whole atom
      1. its made up of protons and neutrons
      2. the electrons
        1. electrons surrond the nucleus in shells (energy levels)
        2. protons are positive(+)
          1. nuetrons are neutal (not charged)
            1. electrons are negitive (-)
              1. the relative masses of parts of an atom
                1. protons and neutrons have the same mass (e.g.1 each)
                  1. the mass of electrons is much smaller (e.g. very ting)
                  2. there are always be the same number protons as electrons (e.g. 2 positive protons = 2 negitive electrons)
                    1. the number of protons there are dicides what type of atom it is (e.g. hydrogen = 1 proton, helium = 2 protons)
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