Boron is a chemical element with the symbol B and atomic number 5. It is a metalloid. Boron is black in powder form, but when heated it forms a thin layer of dark brown oxide that tarnishes quickly to black on exposure to air. Boron occurs naturally only as compounds, not as the free element. More than half the world production of boron is made into sodium perborate for bleaching powder and laundry bleach. Other major uses are in glass, ceramics, and enamels; as an additive in petrol; in agricultural chemicals such as insecticides and fungicides; and in nuclear reactors as a neutron absorber.
A large scientific encyclopedia article on behalf of an outstanding scientist and doctor of sciences would discuss the physical properties of boron, its history, how it is used today across various industries, any dangers associated with its use, and future applications for this versatile element.