Heisenberg And Schrondinger

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Heisenberg And Schrondinger

  1. 1. Werner Heisenberg (1901-1976) <ul><li>German theoretical physicist </li></ul><ul><li>Drew conclusion from Rutherford, Bohr, and De Broglie’s models </li></ul>
  2. 2. Problem with finding the position of an electron <ul><li>Helium balloon in a dark room </li></ul><ul><li>How would you determine the location of this balloon? </li></ul><ul><li>Is the balloon going to stay in the same position? </li></ul><ul><li>Energy transfer </li></ul><ul><li>What if I gave you a flashlight? </li></ul><ul><ul><li>What happens when we shine a beam of light on the balloon? </li></ul></ul>
  3. 3. <ul><li>Photons from light that reflect off of the balloon reach our eyes and tell us where the balloon is </li></ul><ul><li>Is there a transfer of energy? </li></ul><ul><ul><li>How big is the balloon compared to the photons? </li></ul></ul><ul><li>Can we do the same thing with finding the location of an electron in an atom? </li></ul><ul><li>Heisenberg focused on the interactions between photons and electrons… </li></ul>
  4. 4. Heisenberg Uncertainty Principle <ul><li>It is fundamentally impossible to know precisely both the velocity and position of a particle at the same time </li></ul>
  5. 5. Erwin Schrodinger (1926) <ul><li>Austrian physicist </li></ul><ul><li>Furthered De Broglie’s wave-particle theory </li></ul><ul><li>Derived equation that treated hydrogen’s electron as a wave </li></ul><ul><li>Unlike Bohr’s, his fit well with atoms of different elements </li></ul>
  6. 6. Quantum Mechanical Model of the atom
  7. 7. The Quantum Mechanical Model <ul><li>Similar to Bohr’s… </li></ul><ul><ul><li>Limits an electron’s energy to certain values </li></ul></ul><ul><li>Unlike Bohr’s… </li></ul><ul><ul><li>What did Bohr say about the orbit of an electron around the nucleus? </li></ul></ul><ul><ul><li>The Quantum Mechanic Model makes no attempt to describe the electron’s path </li></ul></ul>
  8. 8. <ul><li>Schrodinger’s wave equation </li></ul><ul><ul><li>Solutions to equation called wave function </li></ul></ul><ul><ul><ul><li>Don’t worry about the equation its self…just know the basics…. </li></ul></ul></ul><ul><ul><li>Wave function  probability of finding the electron within a particular volume of space around the nucleus </li></ul></ul><ul><ul><li>High probability  more likely to occur </li></ul></ul><ul><ul><li>Low probability  less likely to occur </li></ul></ul>
  9. 9. What the wave function tells us <ul><li>The atomic orbital of the electron </li></ul><ul><ul><li>Atomic orbital  3-D region around nucleus </li></ul></ul><ul><li>Fuzzy Cloud </li></ul><ul><li>Density of the cloud at a given point is proportional to the probability of finding the electron at that point </li></ul>
  10. 10. New Word <ul><li>Orbital  region of space where there is a 90% probability of finding an electron of a given energy </li></ul><ul><li>“electron cloud” </li></ul>Orbital
  11. 11. What did Bohr assign to electron orbitals? <ul><li>Quantum numbers </li></ul><ul><li>Quantum Mechanical Model does the same… </li></ul>

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