Symbol B Atomic radius: pm 80 Fusion: kJ/Mole 50.2
Name Boron Ionic radius: pm - Boiling point: C 4000
Atomic number 5 Electron affinity 0.28 Melting point: C 2075
Atomic weight 10.81 1st  ion potential 8.30 Specific Heat Cap: J/(g K) 1.03
Classification Metalloid Natural form Solid Thermal Cond: W/(cm K) 0.27
Configuration 1s22s2p1 Crystal structure Rhom Electrical Cond 1x10-12
Oxidation states 3 Density 2.34 Abundance: mg/kg-crust 10
Electronegativity 2.04 Vaporization: kJ/Mole 480.0    
Boron was discovered in 1808 by Sir Humphrey Davy and J.L. Gay-Lussac.   Uses - borax, glass making, heat resistant alloys, nuclear control rod, pest control