Tellurium is a chemical element that has the symbol Te and atomic number 52. A brittle silver-white metalloid which looks like tin, tellurium is chemically related to selenium and sulfur. Tellurium is primarily used in alloys and as a semiconductor.
Tellurium is extremely rare, one of the nine rarest elements on earth. It is in the same chemical family as oxygen, sulfur, selenium, and polonium (the chalcogens).
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