Boron (B)

A fascinating metalloid element.

Boron is element 5 on the periodic table.

Element properties

Atomic number

5

Symbol

B

Atomic mass

10.81 u

Category

Metalloid

Period

2

Group

13

Block

p

State

Solid

Electron configuration

[He] 2s2 2p1

Electronegativity (Pauling)

2.04

Density

2.08 g/cm³

Melting point

2076 °C

Boiling point

3927 °C