Boron is a chemical element with symbol B and atomic number 5. Because boron is produced entirely by cosmic ray spallation and not by stellar nucleosynthesis,[8] it is a low-abundance element in both the solar system and the Earth's crust. Boron is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals. These are mined industrially as evaporites, such as borax and kernite.Symbol: B
Atomic number: 5
Electron configuration: [He] 2s2 2p1
Electrons per shell: 2,3
Atomic mass: 10.811 ± 0.007 u
Discoverers: Joseph Louis Gay-Lussac, Louis Jacques Thénard, Humphry Davy