Tin
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Tin is a chemical element with the symbol Sn (Latin: Stannum) and atomic number 50. Tin is obtained chiefly from the mineral cassiterite, where it occurs as tin dioxide, SnO2. This silvery, malleable poor metal is not easily oxidized in air, and is used to coat other metals to prevent corrosion. It is used in many alloys, most notably bronze, pewter alloys (from 85% to 99% tin), and tin/lead soft solders typically containing 60% or more of tin.