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Table

10.81

B

Boron

Identification

CAS Number: 7440-42-8

Discovery Year: 1808

Discoverer: Sir H. Davy, J.L. Gay-Lussac, L.J. Thénard

Discovery Location: England/France

Properties

Atomic Mass: 10.81 →Density: 2.34 g/cm³ →

Crust Abundance: 10 mg/kg

Crystal Structure: TET

Atomic Dimensions

Atomic Radius: 85 pm →

Atomic Radius (Rahm): 204.99999999999997 pm

Covalent Radius: 84 pm →

Van der Waals Radius: 192 pm

Metallic Radius: 80 pm

Atomic Volume: 4.6 cm³/mol

Lattice Constant: 8.73 Å

Thermodynamics

Melting Point: 2573 K →Boiling Point: 3931 K →Specific Heat: 1.025 J/(g·K) →Thermal Conductivity: 27.4 W/(m·K) →Heat of Fusion: 23.6 kJ/mol →Heat of Vaporization: 504.5 kJ/mol →

Heat of Formation: 565 kJ/mol

Electronic Structure

Electron Config: [He] 2s2 2p

Block: p

Period: 2 →Group: 13 →Electronegativity: 2.04 →Electron Affinity: 0.279723 eV →

Oxidation States: +3

Abundance & Geochemistry

Crust Abundance: 10 mg/kg

Sea Abundance: 4.44 mg/L

Goldschmidt Class: litophile

About

Boron is a metalloid that is essential for plant growth and is used in fiberglass, detergents, and as a neutron absorber in nuclear reactors.

Isotopes

B-11 11 79.60%

B-10 10 20.40%

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B

Boron

Identification

Properties

Atomic Dimensions

Thermodynamics

Electronic Structure

Abundance & Geochemistry

About

Isotopes

Related Elements

Category

Same Group

Same Period

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