Arsenic

Arsenic, ₃₃As
Arsenic
Pípè	/ˈɑːrsnɪk/; (ARS-nik); as an adjective: /ɑːrˈsɛnɪk/; (ar-SEN-ik);
Ìhànsójú	metallic grey
Ìwúwo átọ̀mù Ar, std(As)	74.921595(6)
Arsenic ní orí tábìlì àyè
	germanium ← arsenic → selenium
Nọ́mbà átọ̀mù (Z)	33
Ẹgbẹ́	group 15 (pnictogens)
Àyè	àyè 4
Àdìpọ̀	Àdìpọ̀-p
Ẹ̀ka ẹ́límẹ́ntì	Metalloid
Ìtò ẹ̀lẹ́ktrọ́nù	[Ar] 3d10 4s2 4p3
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 5
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Sublimation point	887 K (615 °C, 1139 °F)
Kíki (near r.t.)	5.727 g/cm3
when liquid (at m.p.)	5.22 g/cm3
Triple point	1090 K, 3628 kPa
Critical point	1673 K, ? MPa
Heat of fusion	(grey) 24.44 kJ/mol
Heat of	? 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 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 2.18
energies	(more);
Atomic radius	empirical: 119 pm
Covalent radius	119±4 pm
Van der Waals radius	185 pm
	Color lines in a spectral rangeSpectral lines of arsenic
Other properties
Natural occurrence	primordial
Crystal structure	rhombohedral
Thermal conductivity	50.2 W/(m·K)
Electrical resistivity	333 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Young's modulus	8 GPa
Bulk modulus	22 GPa
Mohs hardness	3.5
Brinell hardness	1440 MPa
CAS Number	7440-38-2
Main isotopes of arsenic
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

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Itokasi

↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna 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.
↑ editor-in-chief, David R. Lide. (2000). "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (81 ed.). CRC press. ISBN 0849304814. http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf.
↑ Ellis, Bobby D. (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.