All chemical elements

Symbol

B

Atomic number

5

Chemical property

Metalloid

Origin o the name

borax, a mineral

Group

13

Period

2

Atomic weight (u)

10.81

Atomic weight uncertainty (u)

0

Density (g/cm³)

2.34

Melting point (K)

2349

Boiling point (K)

4200

Heat capacity (J/(g·K))

1.026

Electro-negativity

2.04

Abundance in earth's crust (mg/kg)

10