external image boron5.jpg


Atomic number
Atomic mass
10.81 g.mol -1
Electronegativity according to Pauling
2.3 g.cm-3 at 20°C
Melting point
2076 °C
Boiling point
3927 °C
Vanderwaals radius
0.098 nm
Ionic radius
0.027 nm
Electronic shell
[ He ] 2s22p1
Energy of first ionisation
800.5 kJ.mol -1
Energy of second ionisation
2426.5 kJ.mol -1
Energy of third ionisation
3658.7 kJ.mol -1
Discovered by
Sir Humphry Davy and J.L Gay-Lussac in 1808

Boron is classified as a "Metalloid" element and is located in Groups 13, 14,15, 16 and 17 of the Periodic Table. An element classified as a Metalloid has properties of both metals and non-metals. Some are semi-conductors and can carry an electrical charge making them useful in calculators and computers.
Name is made from a combination of Borax and Carbon!
Elemental boron was not known until the early nineteenth century when Sir Humphrey Davy, Gay-Lussac and Thenard prepared boron by reduction of boron trioxide with potassium and by electrolysis of moistened boric acid. The purity of their products was about 50%.http://www.facts-about.org.uk/science-element-boron.htm