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Table

9.01

Be

Beryllium

Identification

CAS Number: 7440-41-7

Discovery Year: 1798

Discoverer: Fredrich Wöhler, A.A.Bussy

Discovery Location: Germany/France

Properties

Atomic Mass: 9.0121831 →Density: 1.85 g/cm³ →

Crust Abundance: 2.8 mg/kg

Crystal Structure: HEX

Atomic Dimensions

Atomic Radius: 105 pm →

Atomic Radius (Rahm): 219 pm

Covalent Radius: 96 pm →

Van der Waals Radius: 153 pm

Metallic Radius: 89 pm

Atomic Volume: 5 cm³/mol

Lattice Constant: 2.29 Å

Thermodynamics

Melting Point: 1551 K →Boiling Point: 3243 K →Specific Heat: 1.824 J/(g·K) →Thermal Conductivity: 201 W/(m·K) →Heat of Fusion: 12.21 kJ/mol →Heat of Vaporization: 309 kJ/mol →

Heat of Formation: 324 kJ/mol

Electronic Structure

Electron Config: [He] 2s2

Block: s

Period: 2 →Group: 2 →Electronegativity: 1.57 →Electron Affinity: -2.4 eV →

Oxidation States: +2

Abundance & Geochemistry

Crust Abundance: 2.8 mg/kg

Sea Abundance: 0.0000056 mg/L

Geochemical Class: alkaline earth metal

Goldschmidt Class: litophile

About

Beryllium is a steel-gray, strong, lightweight metal. It is used in aerospace applications, X-ray equipment, and as an alloying agent.

Isotopes

Be-9 9 100.00%

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Be

Beryllium

Identification

Properties

Atomic Dimensions

Thermodynamics

Electronic Structure

Abundance & Geochemistry

About

Isotopes

Related Elements

Category

Same Group

Same Period

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