Airsenic

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Airsenic,  33As
Arsen 1a.jpg
General properties
Appearance metallic grey
Staundart atomic wecht (Ar, staundart) 74.921595(6)
Airsenic 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 Gold 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
P

As

Sb
germaniumairsenicselenium
Atomic nummer (Z) 33
Group group 15 (pnictogens)
Period period 4
Element category   metalloid
Block p-block
Electron confeeguration [Ar] 4s2 3d10 4p3
Electrons per shell
2, 8, 18, 5
Pheesical properties
Phase (at STP) solit
Sublimation pynt 887 K ​(615 °C, ​1137 °F)
Density (near r.t.) 5.727 g/cm3
when liquid (at m.p.) 5.22 g/cm3
Treeple pynt 1090 K, ​3628[1] kPa
Creetical pynt 1673 K, ? MPa
Heat o fusion (grey) 24.44 kJ/mol
Heat o vapourisation ? 34.76 kJ/mol
Molar heat capacity 24.64 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 553 596 646 706 781 874
Atomic properties
Oxidation states 5, 3, 2, 1,[2] -3 ​mildly acidic oxide
Electronegativity Pauling scale: 2.18
Ionisation energies
Atomic radius empirical: 119 pm
Covalent radius 119±4 pm
Van der Waals radius 185 pm
Color lines in a spectral range
Miscellanea
Creestal structurtrigonal[3]
Simple trigonal creestal structur for airsenic
Thermal conductivity 50.2 W/(m·K)
Electrical resistivity 333 n Ω·m (at 20 °C)
Magnetic orderin diamagnetic[4]
Young's modulus 8 GPa
Bouk modulus 22 GPa
Mohs haurdness 3.5
Brinell haurdness 1440 MPa
CAS Nummer 7440-38-2
History
Diskivery Early Bronze Age (2500 BC)
First isolation Albertus Magnus (1250)
Main isotopes o airsenic
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
73As syn 80.3 d ε 73Ge
γ -
74As syn 17.78 d ε - 74Ge
β+ 0.941 74Ge
γ 0.595, 0.634 -
β 1.35, 0.717 74Se
75As 100% stable
| references | in Wikidata

Airsenic is a chemical element wi seembol As an atomic nummer 33. Airsenic occurs in mony meenerals, uisually in conjunction wi sulfur an metals, an an aa as a pure elemental crystal. It wis first documentit bi Albertus Magnus in 1250.[5] Airsenic is a metalloid. It can exist in various allotropes, altho anly the gray furm haes important uise in industry.

References[eedit | eedit soorce]

  1. Gokcen, N. A (1989). "The As (arsenic) system". Bull. Alloy Phase Diagrams. 10: 11–22. doi:10.1007/BF02882166. 
  2. Ellis, Bobby D.; Charles, L. B. (2004). "Stabilized Arsenic(I) Iodide: A Ready Source of Arsenic Iodide Fragments and a Useful Reagent for the Generation of Clusters". Inorganic Chemistry. 43: 5981. doi:10.1021/ic049281s. 
  3. Arsenic, mindat.org
  4. editor-in-chief, David R. Lide. (2000). "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (81 ed.). CRC press. ISBN 0849304814. 
  5. Emsley, John (2001). Nature's Building Blocks: An A-Z Guide to the Elements. Oxford: Oxford University Press. pp. 43, 513, 529. ISBN 0-19-850341-5.