The periodic Table
coloured by Discovery
coloured by States
Constants, Astronomy
Constants, Physics
SI Units
by Peder Axensten

B


in WebElements
in X-Ray info 		B, 5
boron (English)
bore, m. (French)
Bor, n. (German)
bor (Russian)
boro (Spanish)
bor (Swedish)

Symbol, numberB, 5 (semiconductor), Group: 13; 3A
Weight10.81
In Nature
Discovered1808, by Sir Humphry Davy, J.L. Gay-Lussac and L.J. Thénard (England, France)
Density  [kg/m3]2340 [293 K] (solid)   
Molar volume4.62 cm3
Melting Temperature2573 K   (2300 °C)   Enthalpy: 538.9 kJ/mol
Boiling Temperature3931 K   (3658 °C)   Enthalpy: 22.2 kJ/mol
Electrical resistance18000 [300 K] Wm
ThermalConductivity: 27.0 [300 K] W/Km     Expansion: 5E-6 /K
Configuration1s2 2s2p1
Ionisation [kJ/mol]
  M-->  M+--> M2+--> M3+--> M4+--> M5+--> M6+--> M7+--> M8+--> M9+-->M10+
Thermodynamics
State DfH° DfG° S° CpH H°298.15-H°0
[kJ/mol] [J/Kmol] [kJ/mol]
Isotopes
Mass In nature Half-life Spin m/mN NMM Decay
B