Airsenic

Airsenic, ₃₃As
Airsenic
Pronunciation	/ˈɑːrsənɪk/; (AR-sən-ik); when attributive: /ɑːrˈsɛnɪk/; (ar-SEN-ik);
Appearance	metallic grey
Standard atomic weight Ar, std(As)	74.921595(6)
Airsenic in the periodic cairt
	germanium ← airsenic → selenium
Atomic nummer (Z)	33
Group	group 15 (pnictogens)
Period	period 4
Block	p-block
Element category	Metalloid
Electron confeeguration	[Ar] 3d10 4s2 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 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)
Atomic properties
Oxidation states	−3, −2, −1, 0, 1, 2, 3, 4, 5 (a mildly acidic oxide)
Electronegativity	Pauling scale: 2.18
Ionisation energies	(more);
Atomic radius	empirical: 119 pm
Covalent radius	119±4 pm
Van der Waals radius	185 pm
	Colour lines in a spectral rangeSpectral lines o airsenic
Ither properties
Naitural occurrence	primordial
Creestal structur	trigonal
Thermal conductivity	50.2 W/(m·K)
Electrical resistivity	333 n Ω·m (at 20 °C)
Magnetic orderin	diamagnetic
Young's modulus	8 GPa
Bulk 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
γ	-
β	74Ge
γ	-
β−	74Se
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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.

References

↑ 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.
↑ Gokcen, N. A (1989). "The As (arsenic) system". Bull. Alloy Phase Diagrams. 10: 11–22. doi:10.1007/BF02882166.
↑ 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.
↑ 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.
↑ Arsenic, mindat.org
↑ 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)
↑ 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.
↑ 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.

[CIAAW2013-1] 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.

[Gokcen1989-2] 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] tor-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.

[BuildingBlocks451-3-8] 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.

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