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Created page with "== Introduction == Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found in native form as elemental crystals. thumb|center|A photograph of a piece of pure tellurium.|class=only_on_mobile Image:Detail-720..."