Arsenico

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Arsenic
33As
P

As

Sb
germaniumarsenicselenium
Appearance
metallic grey
General properties
Name, simbolo, kaiphan arsenic, As, 33
Pronunciation Plantilya:IPAc-en Plantilya:Respell,
also Plantilya:IPAc-en Plantilya:Respell when attributive
Element category metalloid
Group, period, block 154, p
Standard atomic weight 74.92160(2)
Electron configuration [Ar] 4s2 3d10 4p3
2, 8, 18, 5
Electron shells of arsenic (2, 8, 18, 5)
History
Discovery Early Bronze Age (2500 BC)
First isolation Albertus Magnus (1250)
Physical properties
Phase magahi
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, 1137 °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 simple trigonal[3]
Arsenic has a simple trigonal crystal structure
Magnetic ordering diamagnetic[4]
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
Most stable isotopes
Main article: Isotopes of arsenic
iso NA half-life DM DE (MeV) DP

Plantilya:Infobox element/isotopes decay2 Plantilya:Infobox element/isotopes decay4 Plantilya:Infobox element/isotopes stable

t  h  u
· r

Ang arsenico (Iningles arsenic) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga As ug kaiphan nga atomik 33. Ang arsenico mao ang metalloid.

Ang mga gi basihan niini[usba | edit source]

  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. Arsenic, mindat.org
  4. 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. 


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