Card Set Information

2010-11-18 19:47:31


Electrons in Atoms
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  1. electromagnetic radiation
    form of energy that exhibits wavelike behavior as it travels through space.
  2. wavelength
    distance between 2 identical parts of a wave
  3. frequency
    how fast wave oscillates up and down
  4. electromagnetic spectrum
    includes all forms of electromagnetic radiation
  5. EM radiation (RMIVUXG)
    • -radio (lowest energy)
    • -microwave
    • -infrared
    • -visible
    • -ultraviolet
    • -x-rays
    • -gamma (highest) (cosmic rays)
  6. visible spectrum
    • less energy, longer freq.
    • more energy, shorter freq.
    • energy increases with increasing frequency
  7. Max Planck
    the quantum concept; light comes from little bundles of energy called quantum
  8. quantum
    minimum amount of energy that can be gained or lost by an atom
  9. Albert Einstein
    photoelectric effect; proposed that EM radiation has both wavelike and particle like natures
  10. photoelectrons
    electrons that are emitted from a metal's surface when light of a certain frequency shines on the surface
  11. photon
    a particle of EM radiation with no mass that carries a quantum of energy
  12. quantum theory
    states that an electron must be in an energy level, not in-between
  13. Bohr
    • -came up with 7 energy levels
    • -each successive energy level gets closer together.
  14. de Broglie relation
    predicts all moving particles have wave-like characteristics
  15. Heisenberg Uncertainty Principle
    It is impossible to make a measurement on an object without disturbing the object in some way, especially if the object is very small.
  16. The aufbau principle
    electrons start at lowest possible energy level