Lab4.docx - Max Ramirez Chem 1221-152 Lab 4 Atomic...

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Max RamirezChem 1221-152Lab 4: Atomic SpectroscopyPre-Lab 4Introduction Statement:In this lab, we will calibrate a spectroscope with a sample of helium by creating a calibration graph from the observed spectral lines. After calibrating the spectroscope, we will go on to observe a Balmer series through detecting cations in salts. By burning the salt and observing the color we can identify the cation present in the salt.Pre-Lab Questions1.Ground state - At room temperature, electrons are at the lowest possible energy levels.Excited state - Electrons move to higher energy levels by absorbing energy or discharging it.Emission spectrum - A list of all possible wavelengths of light emitted by any atom.Balmer series - a grouping of wavelengths in the visible part of the spectrum.2.It’s necessary to calibrate the spectroscope because it reads in angles rather than wavelength so we must convert our readings to wavelengths.

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