The correct answer is iron. Iron has a density of 7.874 g/cm3, while gold has a density of 19.32 g/cm3, silver has a density of 10.5 g/cm3, and copper has a density of 8.96 g/cm3. Therefore, iron is the heaviest metal among the given options.
Gold is a dense, soft, yellow, malleable and ductile metal. It is a chemical element with the symbol Au and atomic number 79. It is one of the least reactive chemical elements and is solid under standard conditions.
Gold often occurs in free elemental (native) form, as nuggets or grains, in rocks, in veins and in alluvial deposits. It occurs in a solid solution series with the native element silver and also naturally alloyed with copper and palladium. Less commonly, it occurs in minerals as gold compounds, such as calaverite, chrysocolle, and chrysocolla.Silver is a chemical element with the symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth’s crust in the pure, free elemental 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, nickel, lead, and zinc refining.
Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the Earth’s crust. It is a ferromagnetic element that is found naturally in its elemental (native) form. Iron has a relative atomic mass of 55.847 and a density of 7.874 g/cm3. It is a hard, strong, and ductile metal that is easily magnetized. Iron is used in a wide variety of applications, including construction, transportation, and manufacturing.
Copper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Copper is one of the most widely used metals in the world, and is a major component of many alloys, including brass and bronze. Copper is also used in electrical wiring, plumbing, and roofing.