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  • Then in 1932 James Chadwick discovered particles with no charge which he called Neutrons
  • So on the board if we put together electrons (blue), protons (red), neutrons (grey), shells (black circles) we get ........
  • We get this one here on the Canvas which is called an atom
  • 4
  • 2
  • 4 as A because you add the # of protons and neutrons added, 2 as Z because its the # of protons, and electrons are neutral or 0 because you add the # of protons (+) and electrons (-) which is 0
  • X
  • So if we use this formula, A would be atomic mass, Z as atomic number, and X as the element it, the element from earlier would look like...this on the board
  • A
  • Z
  • X
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