آرسنیک

Arsenic, ₃₃As
General properties
Pronunciation	/ˈɑrs[invalid input: 'ᵻ']nɪk/, also /ɑrˈsɛnɪk/ when attributive ; AR-sə-nik, ar-SEN-ik
Allotropes	grey (most common), yellow, black
Appearance	metallic grey
Arsenic in the periodic table
germanium ← arsenic → selenium	‍
Atomic number (Z)	33
Group, period	group 15 (pnictogens), period 4
Block	p-block
Element category	metalloid
Standard atomic weight (Ar)	74.921595(6)
Electron configuration	[Ar] 3d10 4s2 4p3
Electrons per shell	2, 8, 18, 5
Physical properties
Phase	solid
Sublimation point	887 K (615 °C, 1137 °F)
Density 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 vaporization	34.76 kJ/mol (?)
Molar heat capacity	24.64 J/(mol·K)
Atomic properties
Oxidation states	5, 4, 3, 2, 1, −1, −2, −3 (a mildly acidic oxide)
Electronegativity	Pauling scale: 2.18
Ionization energies	1st: 947.0 kJ/mol ; 2nd: 1798 kJ/mol ; 3rd: 2735 kJ/mol ; (more)
Atomic radius	empirical: 119 pm
Covalent radius	119±4 pm
Van der Waals radius	185 pm
Miscellanea
Crystal structure	rhombohedral
Thermal expansion	5.6 µm/(m·K) (at r.t.)
Thermal conductivity	50.2 W/(m·K)
Electrical resistivity	333 nΩ·m (at 20 °C)
Magnetic ordering	diamagnetic
Magnetic susceptibility (χmol)	−5.5·10−6 cm3/mol
Young's modulus	8 GPa
Bulk modulus	22 GPa
Mohs hardness	3.5
Brinell hardness	1440 MPa
CAS Number	7440-38-2
تاریخی
Discovery	ca. 800
Main isotopes of arsenic
γ	–
β+	74Ge
γ	–
β−	74Se
	باخ; دانیش; دییش; \| references \| in Wikidata

آرسنیک (اینگیلیسجه: Arsenic) آتوم سایی‌سی ۳۳ اولان بیر شیمیایی عنصوردور.

قایناق

^ Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (کؤمک)
^ Gokcen, N. A (1989). "The As (arsenic) system". Bull. Alloy Phase Diagrams. 10: 11–22. doi:10.1007/BF02882166.
^ 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.
^ Cverna, Fran (2002). ASM Ready Reference: Thermal properties of metals. ASM International. pp. 8–. ISBN 978-0-87170-768-0. pdf.
^ Lide, David R., ed. (2000). "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (81 ed.). CRC press. ISBN 0849304814.
^ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

[CIAAW2016-1] Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (کؤمک)

[Gokcen1989-2] Gokcen, N. A (1989). "The As (arsenic) system". Bull. Alloy Phase Diagrams. 10: 11–22. doi:10.1007/BF02882166.

[3] 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.

[4] Cverna, Fran (2002). ASM Ready Reference: Thermal properties of metals. ASM International. pp. 8–. ISBN 978-0-87170-768-0. pdf.

[5] Lide, David R., ed. (2000). "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (81 ed.). CRC press. ISBN 0849304814.

[6] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

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