Unformatted text preview: he energy needed to promote a ground state 6s electron in Cs to the next energy level
(6p) is so high that only a small fraction of the Cs atoms are excited at the temperature of a
natural gas flame. At the higher temperature of a hydrogen/oxygen flame a much larger
fraction of the atoms is excited, resulting in a more intense Cs emission line. 11. This can be explained by the ionization of uranium. At low concentrations, the fraction of U
that is ionized would be greater, thus giving a nonlinear relationship between concentration
and absorbance. The added alkali metal salt suppresses the U ionization....
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This document was uploaded on 03/06/2014 for the course CHEM 422 at CSU Northridge.
- Fall '08