Atomic Number: 5

Name: Boron

Atomic symbol: B

Atomic Weight: 10.81

Electron affinity: -27 kJ/mol

Electron configuration: 1s²2s²2p¹

Ionization energies: 801 kJ/mol; 2,427 kJ/mol; 3,660 kJ/mol; 25,025 kJ/mol; 32,826 kJ/mol

Pauling electronegativity: 2.0

Melting Point: 2300^oC

Boiling Point: 2550^oC

Density: 2.34 g/cm³

Standard potential (volts), M⁺ + e^- ---> M:

Covalent radius: 0.88 angstroms

Ionic radius: 0.35 angstroms (+1); 0.23 angstroms (+3)

Common oxidation states in compounds: +3