9 - -An electron can jump up from a lower to higher energy...

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Bohr Model of the Atom (1886-1962) - Every atom consists of a nucleus plus electrons , which can be in different energy states. - The farther the electron is from the nucleus, the higher its energy. - Freaky Fact: Electrons can’t be in any energy state. - Allowable energy states are “quantized” - The Bohr Model of the atom imagines the electrons in “orbital’s” - It is a simple but useful model Atoms & Light - Light interacts with atoms by exchanging energy with electrons - An electron in a high energy level can “jump” down to a low energy level. - It loses energy, and emits of a photon of light. - The energy of this photon equals the energy lost by the electrons. - This photon equals the energy lost.
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Unformatted text preview: --------An electron can jump up from a lower to higher energy levels-But, it needs energy to do this.-A photon of light can provide the energy.-However, not every photon can do the trick.-If the photons energy matches the energy difference Between the levels, the photon will be absorbed,-Otherwise it will fly away (Electrons absorbs a photon, causing it to jump to a higher energy level) Because electrons exist only at specific energy levels, photons are emitted & absorbed with specific energies. Absorption Spectrum Emission Spectrum Photons of different wavelengths have different energy. So atoms absorb or emit only certain wavelengths (or colors) of light...
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This document was uploaded on 10/07/2011.

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