Electronic data		Thermal data		Steric data
Shells: 2,2 Orbitals: [He] 2s2 Electronegativity: 1.5, 1.5 1. Ionization potential: 9.3226 eV 2. Ionization potential: 18.211 eV 3. Ionization potential: 153.893 eV Oxidation states: 2 Electrical conductivity: 0.313 10^6		Melting point: 1287 °C Boiling point: 2472 °C Specific heat: 1.82 J/gK Heat of fusion: 12.20 kJ/mol Heat of vaporization: 292.40 kJ/mol Thermal conductivity: 2.00 W/cmK		Atomic radius: 1.40 Å Ionic radius: 0.45 Å () Covalent radius: 0.90 Å Atomic volume: 5.0 cm³/mol Density (293 K): 1.848 g/cm³ Crystal structure: Hexagonal

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
7Be	0	7.0169	3/2	53.28d	EC	View
9Be	100	9.0122	3/2	--	stable	--
10Be	0	10.0135	0	2.6E06y	-	View

Legend

Name origin:	Greek: beryllos, "beryl" (a mineral)
Description:	Hard, brittle, steel-gray metal. Lightest rigid metal. Formerly called glucinium (Gl) for its sweet but deadly taste.
Discovered by:	Fredrich Wöhler, A.A.Bussy
Year:	1798
Place:	Germany/France
Sources:	Found mostly in minerals like beryl [AlBe3(Si6O18)] and chrysoberyl (Al2BeO4). Pure beryllium is obtained by chemically reducing beryl mineral. Also by electrolysis of beryllium chloride.
Use(s):	Its ability to absorb large amounts of heat makes it useful in spacecraft, missiles, aircraft, etc. Emeralds are beryl crystals with chromium traces giving them their green color.