what element is pt

The element with the symbol Pt is platinum. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. It has an atomic number of 78 and a mass of 195.084. Platinum is chemically inert and will not oxidize in air at any temperature. It is also highly resistant to corrosion, making it appealing for jewelry. Platinum is found in nature as the pure metal and also in alloys with other metals of the group, principally in the alluvial deposits of the Ural Mountains, of Columbia, and of some parts of the western United States.