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Created page with "== Overview == Free radicals are atoms, molecules, or ions with unpaired electrons on an otherwise open shell configuration. These unpaired electrons are usually highly reactive, which can result in spontaneous chemical reactions. The reactivity is due to the presence of unpaired electrons, which creates an unstable state. Image:Detail-41725.jpg|thumb|center|A close-up view of free radicals interacting with other molecules.|class=only_o..."