మూస:బెరీలియం మూలకము

బెరీలియం, ₀₀Be

బెరీలియం
Pronunciation	/bəˈrɪliəm/ ​(bə-RIL-ee-əm)
Appearance	white-gray metallic
Standard atomic weight Ar°(Be)
	9.0121831±0.0000005 9.0122±0.0001 (abridged)
బెరీలియం in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium - ↑ Be ↓ Mg లిథియం ← బెరీలియం → బోరాన్
Group	మూస:Infobox element/symbol-to-group/format
Period	period 2
Block	s-block
Electron configuration	[He] 2s2
Electrons per shell	2, 2
Physical properties
Phase at STP	solid
Melting point	1560 K ​(1287 °C, ​2349 °F)
Boiling point	2741 K ​(2468 °C, ​4474 °F)
Density (near r.t.)	1.85 g/cm3
when liquid (at m.p.)	1.690 g/cm3
Critical point	(extrapolated) 5205 K,  MPa
Heat of fusion	12.2 kJ/mol
Heat of vaporization	297 kJ/mol
Molar heat capacity	16.443 J/(mol·K)
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	0, +1, +2 (an amphoteric oxide)
Electronegativity	Pauling scale: 1.57
Ionization energies	(more)
Atomic radius	empirical: 112 pm
Covalent radius	96±3 pm
Van der Waals radius	153 pm
Spectral lines of బెరీలియం
Other properties
Natural occurrence	primordial
Crystal structure	​hexagonal close-packed (hcp)
Speed of sound thin rod	12890 m/s (at r.t.)
Thermal expansion	11.3 µm/(m⋅K) (at 25 °C)
Thermal conductivity	200 W/(m⋅K)
Electrical resistivity	36 n Ω⋅m (at 20 °C)
Magnetic ordering	diamagnetic
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 Number	7440-41-7
History
Discovery	Louis Nicolas Vauquelin (1797)
First isolation	Friedrich Wöhler & Antoine Bussy (1828)
Isotopes of బెరీలియం

References

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