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Lecture3 Atoms Electrons and Bonding

Clearly this was not happening ee 332 spring 2013

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Unformatted text preview: mechanics implies that the electron must continue to lose energy (through radiation of electromagnetic waves) and collapse to the center of the atom. Clearly this was not happening. EE 332 Spring 2013 Quantized Orbitals for Electrons •  Hydrogen atoms (and all other atoms and molecules) were found to give off light at welldefined frequencies. This did not follow any known model of the nature of physical matter. EE 332 Spring 2013 Then some new models were developed that explained these phenomena EE 332 Spring 2013 History of New Physical Models •  •  •  1901 Planck assumed that processes occurred in steps, ‘Quanta’, and thus was able to accurately predict Blackbody radiation. 1905 – Einstein successfully explained the photoelectric effect using a particle nature for light 1913 – Bohr explained the spectra of the Hydrogen atom by assuming a quantized nature for the orbit of electrons around atoms EE 332 Spring 2013 History of Physical Models •  1924 – Pauli showed that some ‘particles’ are such that they cannot occupy the same location at the...
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