Atom Models Explained
Updated: 5/9/2020
Atom Models Explained
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Storyboard Text

  • I reckon if you cut something in half over and over again, you'll reach a point where you can't cut it in half
  • Rutherford Model
  • Lets call them Atomos - uncuttable
  • Dalton Model
  • That idea used negative currents to create light. Instead, Goldstein used positive currents to create light
  • They're a gas filled tube, right, and if we put electrodes at each end and run a current through it, it'll produce light.
  • Discharge Tubes
  • Bohr Model
  • By measuring how much heat each cathode ray generated, how much they could be bent by magnets and other similar things, I could estimate how much the rays weighed. I decided they weren't rays, but electrons. I knew that the atom was neutrally charged, so I imagined the electrons must be randomly placed inside the atom. Being the Englishman I am, this model was called the Plum Pudding model.
  • Plum Pudding
  • Electron Cloud Model
  • My model uses an extremely thin sheet of gold and a screen around the outside. Alpha particles were shot at the gold foil and surprisingly not all flew right through.
  • This led you to believe that the positively charged part of an atom sat in the middle of the atom. This means that most of the atom is just empty space.
  • I realised that the mathematical model set forward by other scientists could be applied to Rutherfords Model. It allowed me to predict where electrons would be within an atom.
  • The model that was created by Bohr is called the planetary model. It shows the electrons orbiting around the nucleus like a solar system.
  • Because the placement of electrons is based on probability, quantum atoms are drawn cloud with different intensity of colour representing but the probability of finding an electron.
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