Review of Fundamentals (3)

Review of Fundamentals (3) - Atomic Structure and...

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1 Electronic structure of matter can be studied by looking at how it interacts with electromagnetic radiation . Atomic Structure and Periodicity: Chapt. 7: 7.1 – 7.5 8: 8.1 – 8.4 Quantum "mechanics" Before 1900… Matter: discrete particles with determinate mass, position, etc. Light: continuous waves - diffraction: constructive destructive - interference:
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2 Atomic Spectra (emission) These observed frequencies are different for excited atoms of different elements. Only four frequencies observed in visible part of spectrum: H-atoms Photoelectric Effect: metal light e - with kinetic energy
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3 Light lines are for two different metals 1. There is a threshold frequency to eject an electron, which is unique to each metal. If the frequency (i.e. energy) of photons hitting the metal is too small, no electron is ejected. The electron does not receive enough energy to overcome the binding energy to the metal. 2. Above the threshold, the kinetic energy increase linearly with frequency.
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Review of Fundamentals (3) - Atomic Structure and...

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