Atomic Structure-C4

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  • Created by: Shannon
  • Created on: 31-05-13 10:57
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  • Atomic Structure
    • Elements with the same atomic number but different mass numbers are isotopes
    • Atomic number- number of protons (=number of electrons)
      • Atomic mass- number of neutrons+ protons
    • The elements in the periodic table are arranged in order of increasing atomic mass
      • E.g. An element with an electronic structure of 2.8.6 has 3 electron shells, so is in the third row
        • The atomic number is 16, so the element is sulphur
    • Dalton had a provisional explanation, which was later confirmed by the better evidence of JJ Thompson, Rutherford and Bohr
      • Geiger and Marsden had some unexpected results which made significant contributions to Rutherford and Bohr's ideas

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