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Airsenic,33As
👁 Image
Airsenic
Pronunciation
Appearancemetallic grey
Standard atomic weightAr,std(As)7001749215950000000♠74.921595(6)[1]
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
germanium ← airsenic → selenium
Atomic nummer (Z)33
Groupgroup15 (pnictogens)
Periodperiod4
Blockp-block
Element category Metalloid
Electron confeeguration[Ar] 3d10 4s2 4p3
Electrons per shell2, 8, 18, 5
Pheesical properties
Phase atSTPsolit
Sublimationpynt887K​(615°C,​1137°F)
Density(nearr.t.)5.727g/cm3
whenliquid (atm.p.)5.22g/cm3
Treeplepynt1090K,​3628[2]kPa
Creeticalpynt1673K,?MPa
Heatofusion(grey) 24.44kJ/mol
Heat o vapourisation? 34.76kJ/mol
Molar heat capacity24.64J/(mol·K)
Vapourpressur
P(Pa) 1 10 100 1k 10k 100k
atT(K) 553 596 646 706 781 874
Atomic properties
Oxidation states−3, −2, −1, 0,[3] +1,[4] +2, +3, +4, +5 (amildly acidic oxide)
ElectronegativityPaulingscale: 2.18
Ionisation energies
Atomic radiusempirical:119pm
Covalent radius119±4pm
Van der Waals radius185pm
👁 Colour lines in a spectral range
Colour lines in a spectral range
Spectral lines o airsenic
Ither properties
Naitural occurrenceprimordial
Creestal structur​trigonal[5]
Thermal conductivity50.2W/(m·K)
Electrical resistivity333 nΩ·m(at20°C)
Magnetic orderindiamagnetic[6]
Young's modulus8GPa
Bulk modulus22GPa
Mohs haurdness3.5
Brinell haurdness1440MPa
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

Airsenic is a chemical element wi symbolAs an atomic nummer33. 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.[7] Airsenic is a metalloid. It can exist in sindry allotropes, altho anly the gray furm haes important uise in industry.

References

[eedit | edit soorce]
  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.
  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. PMID15360247.
  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. ISBN0849304814.CS1 maint: extra text: authors leet (link)
  7. ↑ Emsley, John (2001). Nature's Building Blocks: An A-Z Guide to the Elements. Oxford: Oxford University Press. pp.43, 513, 529. ISBN0-19-850341-5.
The periodic cairt o the elements
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
Alkali metals Alkaline yird metals Lanthanides Actinoids Transeetion elements Ither metals Metalloids Ither nane-metals Halogens Noble gases Unkent chemical properties
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