Antimony

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Antimony,  51Sb
Antimony-4.jpg
General properties
Appearancesillery lustrous gray
Staundart atomic wecht (Ar, staundart)121.760(1)[1]
Antimony in the periodic cairt
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 Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) 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 Gowd Mercur (element) Thallium Leid (element) 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
As

Sb

Bi
tinantimonytellurium
Atomic nummer (Z)51
Groupgroup 15 (pnictogens)
Periodperiod 5
Element category  metalloid
Blockp-block
Electron confeeguration[Kr] 4d10 5s2 5p3
Electrons per shell
2, 8, 18, 18, 5
Pheesical properties
Phase (at STP)solit
Meltin pynt903.78 K ​(630.63 °C, ​1167.13 °F)
Bylin pynt1860 K ​(1587 °C, ​2889 °F)
Density (near r.t.)6.697 g/cm3
when liquid (at m.p.)6.53 g/cm3
Heat o fusion19.79 kJ/mol
Heat o vapourisation193.43 kJ/mol
Molar heat capacity25.23 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 807 876 1011 1219 1491 1858
Atomic properties
Oxidation states5, 3, -3
ElectronegativityPauling scale: 2.05
Ionisation energies
Atomic radiusempirical: 140 pm
Covalent radius139±5 pm
Van der Waals radius206 pm
Coloyr lines in a spectral range
Spectral lines o Antimony
Miscellanea
Creestal structurtrigonal
Simple trigonal creestal structur for antimony
Speed o soond thin rod3420 m/s (at 20 °C)
Thermal expansion11 µm/(m·K) (at 25 °C)
Thermal conductivity24.4 W/(m·K)
Electrical resistivity417 n Ω·m (at 20 °C)
Magnetic orderindiamagnetic[2]
Young's modulus55 GPa
Shear modulus20 GPa
Bouk modulus42 GPa
Mohs haurdness3.0
Brinell haurdness294 MPa
CAS Nummer7440-36-0
History
Diskivery3000 BC
First isolationVannoccio Biringuccio (1540)
Main isotopes o antimony
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
121Sb 57.36% - (SF)
123Sb 42.64% - (SF)
125Sb syn 2.7582 y β 125Te
Decay modes in parentheses are predictit, but hae nae yet been observed
| references | in Wikidata

Antimony is a chemical element wi seembol Sb (frae Laitin: stibium) an atomic nummer 51. A lustrous gray metalloid, it is foond in naitur mainly as the sulfide meeneral stibnite (Sb2S3). Antimony compoonds hae been kent syne auncient times an wur uised for cosmetics; metallic antimony wis an aa kent, but it wis erroneously identified as leid. It wis established tae be an element aroond the 17t century.

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