Arsenic

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Arsenic
33As
P

As

Sb
germaniumarsenicselenium
Ìhànsójú
metallic grey
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà arsenic, As, 33
Ẹ̀ka ẹ́límẹ̀nti metalloid
Ẹgbẹ́, àsìkò, àdìpò 154, p
Ìwúwo átọ́mù 74.92160(2)
Ìtòléra ẹ̀lẹ́ktrónì [Ar] 4s2 3d10 4p3
2, 8, 18, 5
Physical properties
Phase solid
Density (near r.t.) 5.727 g·cm−3
Liquid density at m.p. 5.22 g·cm−3
Sublimation point 887 K, 615 °C, 1139 °F
Triple point 1090 K (817°C), 3628 [1] kPa
Critical point 1673 K, ? MPa
Heat of fusion (grey) 24.44 kJ·mol−1
Heat of vaporization  ? 34.76 kJ·mol−1
Molar heat capacity 24.64 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 553 596 646 706 781 874
Atomic properties
Oxidation states 5, 3, 2, 1,[2] -3
(mildly acidic oxide)
Electronegativity 2.18 (Pauling scale)
Ionization energies
(more)
1st: 947.0 kJ·mol−1
2nd: 1798 kJ·mol−1
3rd: 2735 kJ·mol−1
Atomic radius 119 pm
Covalent radius 119±4 pm
Van der Waals radius 185 pm
Miscellanea
Crystal structure rhombohedral
Arsenic has a rhombohedral crystal structure
Magnetic ordering diamagnetic[3]
Electrical resistivity (20 °C) 333 nΩ·m
Thermal conductivity 50.2 W·m−1·K−1
Young's modulus 8 GPa
Bulk modulus 22 GPa
Mohs hardness 3.5
Brinell hardness 1440 MPa
CAS registry number 7440-38-2
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù arsenic
iso NA half-life DM DE (MeV) DP
73As syn 80.3 d ε - 73Ge
γ 0.05D, 0.01D, e -
74As syn 17.78 d ε - 74Ge
β+ 0.941 74Ge
γ 0.595, 0.634 -
β 1.35, 0.717 74Se
75As 100% 75As is stable with 42 neutrons
· r


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Gokcen, N. A (1989). "The As (arsenic) system". Bull. Alloy Phase Diagrams 10: 11–22. doi:10.1007/BF02882166. 
  2. 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. 
  3. 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.