Platinum is a chemical element (atomic number 78). It is a shiny grey metal that is very dense, but also very malleable. It is also very resistant to corrosion, including exposure to acid. In addition to being a rare and precious metal, it has numerous industrial uses, such as being used in catalytic converters in exhaust systems.
In medicine, platinum is a common component in medical instruments due to its ability to be shaped easily and its ability to withstand corrosion. It is also used extensively in dentistry.