Airsenic

(Reguidit frae Arsenic)

Airsenic is a chemical element wi symbol As an atomic nummer 33. Airsenic occurs in mony minerals, uisually in conjunction wi sulfur an metals, an an aa as a pure elemental crystal. It wis first documentit bi Albertus Magnus in 1250.[8] Airsenic is a metalloid. It can exist in sindry allotropes, altho anly the gray furm haes important uise in industry.

Airsenic, 33As
Template:Infobox element/symbol-to-top-image/alt
Airsenic
Pronunciation
Appearancemetallic grey
Standard atomic weight Ar, std(As)74.921595(6)[1]
Mass numberAs:
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 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
P

As

Sb
germaniumairsenicselenium
Atomic nummer (Z)33
Groupgroup 15 (pnictogens)
Periodperiod 4
Blockp-block
Element category  Metalloid
Electron confeeguration[Ar] 3d10 4s2 4p3
Electrons per shell2, 8, 18, 5
Pheesical properties
Phase at STPsolit
Sublimation pynt887 K ​(615 °C, ​1137 °F)
Density (near r.t.)5.727 g/cm3
when liquid (at m.p.)5.22 g/cm3
Treeple pynt1090 K, ​3628[2] kPa
Creetical pynt1673 K, ? MPa
Heat o fusion(grey) 24.44 kJ/mol
Heat o vapourisation? 34.76 kJ/mol
Molar heat capacity24.64 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−3, −2, −1, 0,[3] +1,[4] +2, +3, +4, +5 (a mildly acidic oxide)
ElectronegativityPauling scale: 2.18
Ionisation energies
Atomic radiusempirical: 119 pm
Covalent radius119±4 pm
Van der Waals radius185 pm
Colour lines in a spectral range
Spectral lines o airsenic
Ither properties
Naitural occurrenceAs: Primordial
Creestal structurtrigonal[5]
Simple trigonal creestal structur for airsenic
Thermal conductivity50.2 W/(m·K)
Electrical resistivity333 n Ω·m (at 20 °C)
Magnetic orderindiamagnetic[6]
Young's modulus8 GPa
Bulk modulus22 GPa
Mohs haurdness3.5
Brinell haurdness1440 MPa
CAS Nummer7440-38-2
History
DiskiveryEarly Bronze Age (2500 BC)
First isolationAlbertus 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+ 74Ge
γ -
β 74Se
75As 100% stable
| references

ReferencesEedit

  1. Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305. Cite uses deprecated parameter |displayauthors= (help)
  2. Gokcen, N. A (1989). "The As (arsenic) system". Bull. Alloy Phase Diagrams. 10: 11–22. doi:10.1007/BF02882166.
  3. Abraham, Mariham Y.; Wang, Yuzhong; Xie, Yaoming; Wei, Pingrong; Shaefer III, Henry F.; Schleyer, P. von R.; Robinson, Gregory H. (2010). "Carbene Stabilization of Diarsenic: From Hypervalency to Allotropy". Chemistry: a European Journal. 16 (2): 432–5. doi:10.1002/chem.200902840.
  4. Ellis, Bobby D.; MacDonald, 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 (19): 5981–6. doi:10.1021/ic049281s. PMID 15360247.
  5. Arsenic, mindat.org
  6. 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.CS1 maint: extra text: authors leet (link)
  7. 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.
  8. 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.