ECE331 Wi11 lecture 10

ECE331 Wi11 lecture 10 - Electronic Properties: back to...

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Electronic Properties: back to lectrons and bonding electrons and bonding (a) The Thompson model of an atom, in which the positive charge is uniformly distributed in a sphere and the electrons are considered to be negative it h bd ddi i t point charges embedded in it (b) the Bohr model, in which the positive charge is concentrated in a small ucleus and the electrons orbit in circles: dividual orbitals mean nucleus and the electrons orbit in circles:
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Energy values of electronics in atoms nd solids: potential and kinetic energy and solids: potential and kinetic energy + Potential energy diagram for an electron in the vicinity of a single positive point charge. The electron is considered to be a point charge. E vac = vacuum energy level. Corresponds to the energy state of a completely unbound, or free electron
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Allowed electron energy levels in an isolated ydrogen atom hydrogen atom Free e- iscrete energy values are a Discrete energy values are a consequence of Quantum Mechanics Completely bound e- E n = -13.6x(1/n 2 ) eV Classical physics would have predicted that electrons an have arbitrary energy values can have arbitrary energy values NOT SO!!
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Quantum Mechanics “Teaser” Energy band diagram for two noninteracting hydrogen nuclei
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Quantum Mechanics “Teaser” cont. As the nuclei are brought together, the upper energy levels
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This note was uploaded on 04/30/2011 for the course ECE 331 taught by Professor Rajan during the Spring '09 term at Ohio State.

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ECE331 Wi11 lecture 10 - Electronic Properties: back to...

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