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Cuprum, or copper (chemical symbol Cu), has an atomic mass of 63.546 and is a metallic element with an atomic number of 29 on the periodic table. Copper is renowned for its excellent electrical and thermal conductivity. It has a reddish-brown color and metallic luster, with a density of 8.96 grams per cubic centimeter. Copper is a transition metal, belonging to Group 11 of the periodic table. Its ductility, durability, and ease of extraction and smelting make it widely used in military applications, currency, and daily life.