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  • Carbon-14, an isotope with a half-life of 5715 years, has been widely used to date such materials as wood, archaeological specimens, etc.CostsAs of 1990 carbon-13 was commercially available at a cost of about $700/g.Sources: Los Alamos National Laboratory; CRC Handbook of Chemistry and Physics; American Chemical SocietyElement image from www.element-collection.com used with permission
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