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Se   -   Selenium (34/78.96)

Material List
(U,Th)Se (1) AgGaSe2 (2) As,Se (2) As,Se,X (4)
CdCr2Se4 (1) CoSe2 (1) EuSe (1) FeNb3Se10 (1)
GaSe (2) Ge,Se (3) InSe (2) NaVSe2 (2)
NbSe3 (1) NiSe2 (2) Pb,Ge,Se (4) Se (11)
Se,Te (1) Te,Se (4) USe (3) VSe,N2H4 (4)
VSe2 (2)
21 material, 54 document(s) are retrieved.
  • Naturally occurring isotopes: 80 78 82 76 77 74
  • Density: 4.792 (gray)(293.15K) g/cm3
  • Melting point: 217 (gray) oC
  • Boiling point: 684.9 ± 1.0 oC
  • Latent heat of fusion: 68.93 J/g
  • Specific heat: 0.1606 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 3.68E+01 cm/cm/K (at room temp.)
  • Thermal conductivity: 4.52E-02 (at 25C) W/cm/K (at room temp.)
  • Electrical resistivity: 1.00E+00 hm-cm (at room temp.)
  • lonization potential (1st): 9.752 eV
  • Electronic work function Φ: 5.9
  • Oxidation potentials: Se + 3H2O → H2SeO3 + 4H+ + 4e = -0.740 V
  • Chemical valence: -2 4 6
  • Electrochemical equivalents: 0.7365 g/amp-hr
  • lonic radius: 0.5 (Se4+) angstrom
  • Valence electron potential: 120 -eV
  • Principal quantum number: 4
  • Principal electron shells: K L M N
  • Electronic configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4
  • Valence electrons: 4s2 4p4
  • Crystal form: Hexagonal Monoclinic Amorphous
  • Half life:
  • Cross section σ: 12.2 ± 0.6 barns
  • Vapor pressure: Pa (at melting point)