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PERIODIC TABLE
Boron
Atomic No. 5
B
Boron
About Boron
Boron is a metalloid with atomic number 5 whose chemistry is dominated by covalent bonding and the +3 oxidation state. Boric oxide is used in borosilicate glass, while boron carbide provides hardness for abrasives and protective armor. Boron is also used to dope silicon semiconductors, and the strong neutron absorption of boron 10 is useful in neutron detection and shielding.
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
Boron Products
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