Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, silvery-white metalloid that is primarily used in alloys and as a semiconductor in electronic devices. Tellurium is found in nature mainly in the form of telluride minerals and is often extracted as a byproduct of copper refining. This element has unique properties that make it valuable in various applications, including solar panels and thermoelectric devices. Tellurium compounds can also be used in the production of glass and ceramics, enhancing their durability and performance.