Berilio

Beryllium
4Be
- ↑ Be ↓ Mg Periodic table lithium ← beryllium → boron
Appearance
white-gray metallic
General properties
Name, simbolo, kaiphan	beryllium, Be, 4
Pronunciation	Plantilya:IPAc-en Plantilya:Respell
Element category	puthaw
Group, period, block	2, 2, s
Standard atomic weight	9.012182(3)
Electron configuration	[He] 2s2 2, 2
History
Discovery	Louis Nicolas Vauquelin (1797)
First isolation	Friedrich Wöhler & Antoine Bussy (1828)
Physical properties
Phase	magahi
Density (near r.t.)	1.85 g·cm−3
Liquid density at m.p.	1.690 g·cm−3
Melting point	1560 K, 1287 °C, 2349 °F
Boiling point	2742 K, 2469 °C, 4476 °F
Heat of fusion	12.2 kJ·mol−1
Heat of vaporization	297 kJ·mol−1
Molar heat capacity	16.443 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1462 1608 1791 2023 2327 2742
Atomic properties
Oxidation states	2, 1 (amphoteric oxide)
Electronegativity	1.57 (Pauling scale)
Ionization energies (more)	1st: 899.5 kJ·mol−1
	2nd: 1757.1 kJ·mol−1
	3rd: 14848.7 kJ·mol−1
Atomic radius	112 pm
Covalent radius	96±3 pm
Van der Waals radius	153 pm
Miscellanea
Crystal structure	hexagonal
Magnetic ordering	diamagnetic
Electrical resistivity	(20 °C) 36 nΩ·m
Thermal conductivity	200 W·m−1·K−1
Thermal expansion	(25 °C) 11.3 µm·m−1·K−1
Speed of sound (thin rod)	(r.t.) 12870 m·s−1
Young's modulus	287 GPa
Shear modulus	132 GPa
Bulk modulus	130 GPa
Poisson ratio	0.032
Mohs hardness	5.5
Vickers hardness	1670 MPa
Brinell hardness	600 MPa
CAS registry number	7440-41-7
Most stable isotopes
Main article: Isotopes of beryllium
iso NA half-life DM DE (MeV) DP 7Be trace 53.12 d ε 0.862 7Li γ 0.477 - 9Be 100% 9Be is stable with 5 neutrons 10Be trace 1.36×106 y β− 0.556 10B

Ang berilio (Iningles beryllium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Be ug kaiphan nga atomik 4. Ang berilio mao ang puthaw.

Galeriya sa hulagway

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