B
5 metalloid Generated with AI
Boron
Symbol B
Atomic Mass 10.81
Boron is a metalloid chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, 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.
Properties
- Phase: Solid
- Density: 2.08 g/cm³
- Melting Point: 2349 K
- Boiling Point: 4200 K