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Unformatted text preview: ionized . 4. The periodic table of the elements for most astronomers contains Hydrogen, Helium, and metals. 5. An atom becomes excited when it absorbs a photon. When it de-excites, it emits a photon....
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This note was uploaded on 01/20/2012 for the course AST 1002 taught by Professor Dr.haywoodsmith,jr during the Spring '07 term at University of Florida.
- Spring '07