Boron

Properties

Atomic Number

5

Atomic Symbol

B

Atomic Mass

10.81

CAS No.

7440-42-8

Density

2.46 g/cm³

Series

metalloid

Melting Point

2,075°C

Boiling Point

4,000°C

Thermal Conductivity

0.27 W/cm °C

Heat of Fusion

50 kJ/mol

Heat of Vaporization

507 kJ/mol

Electronegativity

2.04 pauling

Crystal Structure

Trigonal

Electrical Conductivity

0.0001 S/m