27 - Materials: numerous metal compounds, bunsen burner,...

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1 Flame Tests of the Elements Brockport High School NY USA AP Chemistry Mr Keefer Introduction Many elements produce a characteristic color when burned in a flame. The color is produced when electrons in the outer energy levels are removed by the intense heat, then return to their original energy level. The wavelength of the photon emitted matches exactly the energy difference between infinity, or some other principal quantum number, and the level to which the electron returns. Photons with wavelengths between 390 and 750 nm are visible to us. In this lab, we study qualitatively the colors produced by Group 1 and Group 2 metals, along with some transition metals species.
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Unformatted text preview: Materials: numerous metal compounds, bunsen burner, goggles, nichrome wire, spectrum chart Methods and Analysis Caution: DO NOT mix chemicals 1. Light the bunsen burner and produce the hottest flame possible. 2. Touch the nichrome wire to the metal compound to be tested. 3. Place the compound in the bunsen burner flame and match the characteristic color as closely as possible with the spectrum chart. Record the wavelength in nm. 4. Repeat for all compounds. 5. For each color, calculate the energy in Joules, the frequency in Hertz, and the kJ/mole....
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This note was uploaded on 08/31/2010 for the course SCI 56-1120 taught by Professor Unni during the Spring '09 term at Columbia College.

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