Emission Spectroscopy

Iodine fluorescence in cuvette

The Fluorescence Spectrum of Iodine

6 Minute ReadIntroduction In two earlier posts on this site we recorded the absorption spectrum of molecular iodine I2 with some simple instrumentation. The first section outlined the basic theory giving rise to the vibrational absorption bands in the spectrum of any diatomic molecule. The second section described how the home experimenter can produce an absorption spectrum

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Selenium sample in glass tube

Selenium: An element that can’t make up its mind

6 Minute ReadIntroduction The chemical element Selenium. Atomic number 34. Chemical symbol Se. The quirky title I chose for this post – an element that can’t make up its mind – refers to the fact that selenium is generally considered a nonmetal. However, it has also been classed, by many investigators in the past, as a metalloid.

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