Boron (B) in the periodic table — PeriodicTable

Boron (B) in the periodic tableBoron is element 5, a metalloid of the p block, in group 13, period 2. Its ground-state configuration is [He] 2s2 2p1, and it usually shows the oxidation states 0, 3.It was discovered in 1808, by Davy and Gay-Lussac.Name origin: borax, a mineral. Blank rows are columns the sheet does not measure for this element.

Property

Value

Unit

Atomic weight

10.812

Da

Electronegativity

2.04

First ionisation energy

800.6

kJ/mol

Covalent radius

82

pm

Van der Waals radius

192

pm

Melting point

2349

K

Boiling point

4200

K

Density

2.34

g/cm³

Abundance

10

mg/kg

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