Chem. II Lab- Emission Spectra

Chem. II Lab- Emission Spectra - Laboratory Report...

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Laboratory Report Devon Corcoran Chemistry II Laboratory Dr. Ward Emission Spectra Introduction Emission spectra are the lines of light which indicate the frequencies of photons that are emitted by excited electrons falling to lower energy states. The frequencies of light emitted by excited electrons can be used to identify specific elements and compounds, and therefore emission spectra are very useful in Chemistry. Infrared light can reveal the actual components of a molecule, and in some cases, even how those elements are arranged within the molecule. Aside from the infrared region of the spectrum telling a chemist what elements are present in a compound and how they are arranged, the intensity of the light emitted can also indicate the concentration of each element within the compound. The Bohr model is the simplest model for an atom; it consists of a nucleus and an electron shell. The shell has several layers, and electrons can move between the layers by gaining or losing energy. Atoms gain energy when they are exposed to heat or electricity, and their electrons take this energy and move to a higher energy level, called an excited state. When excited electrons lose energy, they travel to a layer of the shell that is closer to the nucleus, and emit a photon. The color of the photon is dependent on how many energy levels the electron fell. The energy of the photon which is emitted is simply the absolute value of the energy lost by the falling electron. ν
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Chem. II Lab- Emission Spectra - Laboratory Report...

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