Ru is a chemical element with the symbol Ru and atomic number 44. It is a rare, silvery-white metal that belongs to the platinum group of metals. Ru is known for its high melting point and excellent resistance to corrosion, making it valuable in various industrial applications, including electronics and catalysts. In nature, Ru is typically found in ores alongside other platinum group metals. It is often used in the production of electrical contacts, as well as in the manufacturing of certain types of jewelry. Additionally, Ru has applications in the field of medicine, particularly in cancer treatment.