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Silver is the metallic element with the atomic number 47. Its symbol is Ag, from the Latin argentum, from a PIE rootreconstructed as *h2er?-, "grey" or "shining". A soft, white, lustrous transition metal, it possesses the highestelectrical conductivity, thermal conductivity, and reflectivity of any metal. The metal occurs naturally in its pure, free form (native silver), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.