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| • | Electron can only
be located in certain |
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| stable orbits.
Bohr assumed that the energy |
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| of the e-’s orbit
and its radius are ________. |
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| Not all energies
or radii are allowed. |
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| • | Moving from one
orbit (quantum level) to |
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| another causes
atom to absorb or emit a |
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| photon (particle
of light) of energy |
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