CHMA10H3 Lecture 11: Quantum Model of the Atom

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CHMA10H3 Full Course Notes
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He developed a math model of the atom with discrete energy levels or shells: electrons release or emit light while moving between shells, predicted hydrogen atom exactly. Bohr"s model re-produced the line spectra for 1 electron system perfectly, but it relied on e- being particles. Later, louis de broglie proposed that all subatomic particles behave as waves and particles . The more massive an object is, the less the wave nature becomes. Evidence of dual particle/wave nature of the electron led heisenberg led to the. Act of measurement changes the properties of the electron (i. e. you can"t measure it without disturbing it) Impossible to determine simultaneously both position and velocity of an electron (or any other small particle) Basically, we cannot precisely specify when an electron of know energy is at any moment of time. Explanation required completely new mathematics and so invented matrix mechanics to describe the electrons in an atom.

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