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MJM009 Guadalupe Chavez (cq), 15, left to right, Gregory Telisma (cq), 16, and Mitch DeRungs (cq), 15, conduct an experiment on the reactivity of halides in Becca Meyer's Chemistry 1 class at Denver School of Science and Technology Monday 12/03/07. (MATT MCCLAIN/ROCKY MOUNTAIN NEWS)

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