Scandium is a chemical element with the symbol Sc and atomic number 21. It is a silvery-white, lightweight metal that is stronger than aluminum and almost as strong as titanium, but much lighter than both. Scandium has a variety of industrial and technological applications, including in aerospace, electronics, and sports equipment. It is used in the aerospace industry to make lightweight and strong components for airplanes, rockets, and satellites. In electronics, scandium is used to make high-intensity lamps and displays. Scandium alloys are also used in sports equipment such as bicycle frames and baseball bats because of their strength and lightness. Additionally, scandium is used in some medical applications, including as a contrast agent in magnetic resonance imaging (MRI) scans. Although scandium is not very common, it can be found in small amounts in minerals such as scandium aluminum silicate and wolframite.