Yttrium is a chemical element with the symbol Y and atomic number 39. It is a silvery-metallic transition metal that is part of the lanthanide series. Yttrium is primarily found in rare earth minerals and is used in various applications, including electronics, superconductors, and phosphors for color television tubes. Yttrium is known for its high melting point and resistance to corrosion. It plays a crucial role in the production of LED lights and is also used in medical applications, such as radiation therapy for cancer treatment. Its unique properties make it valuable in modern technology.