118
11HHydrojen2
13141516172HeHelyum
23LiLythyum4BeBerylyum5BBoron6CCarbon7NNytrojen8OOxyjen9FFluryn10NeNeon
311NaSodyum12MgMagnysyum345678910111213AlAlumynyum14SiSylycon15PFosforus16SSulfor17ClCloryn18ArArgon
419KCalyum20CaCalcyum21ScScandyum22TiTytanyum23VVanadyum24CrCromyum25MnManganus26FeHorn27CoCobolt28NiNykel29CuCober30ZnSynk31GaGalyum32GeGermanyum33AsArsenyk34SeSelenyum35BrBromyn36KrCrypton
537RbRubydyum38SrStrontyum39YYtryum40ZrZerconyum41NbNyobyum42MoMolybdenum43TcTechnytyum44RuRuthenyum45RhRhodyum46PdPaladyum47AgArhans48CdCadmyum49InEyndyum50SnSten51SbAntymony52TeTeluryum53IEyodyn54XeXenon
655CsCesyum56BaBaryum57-71
La-Lu
72HfHafnyum73TaTantalum74WTungsten75ReRhenyum76OsOsmyum77IrYrydyum78PtPlatynum79AuOwr80HgArhans Bew81TlThalyum82PbPlom83BiBysmuth84PoPolonyum85AtAstatyn86RnRadon
787FrFrankyum88RaRadyum89-103
Ac-Lr
104RfRutherfordyum105DbDubnyum106SgSeaborgyum107BhBohryum108HsHassyum109MtMeytneryum110DsDarmstadtium111RgRoentgenium112CnCopernicium113NhNihonium114FlFlerovium115McMoscovium116LvLivermorium117TsTennessine118OgOganneson
8119UueUnunennium120UbnUnbinilium121-126
Ubu-Ubh
57LaLanthanum58CeKeryum59PrPrasodyum60NdNeodymyum61PmPromethyum62SmSamaryum63EuEuropyum64GdGadolynyum65TbTerbyum66DyDysprosyum67HoHolmyum68ErErbyum69TmThulyum70YbYterbyum71LuLutetyum
89AcActynyum90ThThoryum91PaProtoactynyum92UUranyum93NpNeptunyum94PuPlutonyum95AmAmerycanyum96CmCuryum97BkBerkelyum98CfCalyfornyum99EsEynsteynyum100FmFermyum101MdMendelevyum102NoNobelyum103LrLawrencyum
121UbuUnbiunium122UbbUnbibium123UbtUnbitrium124UbqUnbiquadium125UbpUnbipentium126UbhUnbihexium127UbsUnbiseptium
Selenyum
Se34
78.9710814817005 (g/mol)
Anmetalow erell
Overview
  • Latin name:
    Selenium
  • Hanow Sowsnek:
    Selenium
  • Diskudhans year:
    1817
  • Discoverer:
    Jöns Jakob Berzelius
  • Pow an Diskudhans:
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  • Costu per 100 grammi:
    28 USD
  • CAS Number:
    CAS7782-49-2
  • Elektron shell:
    K2-L8-M18-N6-O0-P0-Q0-R0
            Elektrons:
            34
            Protons:
            34
            Neutrons:
            45
            Properties
            • Niver atomek:
              34
            • Atomek poester (Relative atomek mass):
              78.9710814817005 (g/mol)
            • Tewder:
              4.81 (g/cm³)
            • Poynt tedha:
              221.0°C = 429.80°F = 494.15K
            • Poynt bryjyon:
              685.0°C = 1265.00°F = 958.15K
            • Valence:
              2, 4, 6
            • Period:
              4
            • Group:
              VIA
            • Block:
              p - block
            • Spektrum dyllans:
            Perthyansow thermodynamek
            • Phase:
              Solid
            • Fusion heat:
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            • Tommder arbennek:
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            • Thermal omlesans:
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            • Tommder ethenans:
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            Atomek properties
            • Elektron configuration:
              [Ar] 3d10 4s2 4p4 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4
            • Studhow oksidyans:
              • -
              • -1
              • -2
              • -
              • -
              • -
              • +1
              • +2
              • -
              • +4
              • -
              • +6
              • -
              • -
              • -
            • Ion kost:
              Se2-
            • Galloes ionheans an atom:
              9.752 (eV)
            • Atomek radius:
              103 (pm)
            • Radius kovalent:
              118 (pm)
            • Radius Van der Waals:
              190 (pm)
            Perthyansow elektromagnetek
            • Tredanel conductivity:
              83333333.3333333 (S/m)
            • Tredanel type:
              ----
            • Eghen vagnetek:
              Diamagnetic
            • Susceptibilita magnetek folum:
              -1.93 ⋅ 10-5
            • Susceptibilita magnetek poes:
              -4 ⋅ 10-9
            • Susceptibilita magnetek molar:
              -3.16 ⋅ 10-10 (m³/mol)
            • Resistivity:
              1.2 ⋅ 1010 (Ω · m)
            • Poynt ughhedhesedh:
              ----
            Crystal bagh
            • Structure of the grid:
              Hexagonal
            • Grid parameters:
              a=4.364 Å; c=4.959 Å
            • Stons
              1.136
            • Tempredh Debye:
              -183.15°C = -297.67°F = 90K
            Keworansel information
            • Color:
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            • CAS Number:
              CAS7782-49-2
            • CID Number:
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            • RTEC Number:
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            • Kaletter Brinell:
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            • Mohs hardness:
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            • Kaletter Vickers:
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            • Bulk modulus:
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            • Modulus Young:
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            • Liquid tewder:
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            • Folum molar:
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            • Kevradh Poisson:
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            • Modulus trehans:
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            • Sound speed:
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            • Menegva plegyans:
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            • Hedhesedh tommder:
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            Reactivity
            • Electronegativity:
              2.55
            • Valence:
              2, 4, 6
            • Elektron affinity:
              194.9587 (kJ/mole)
            Perthyansow nuklerek
            • Radioactive:
              Na
            • Half life, s:
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            • Lifetime, s:
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            • Neutron krows section, barn:
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            • Fire hazard:
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            • Peryl yeghes:
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            • Reactivity:
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            • Peryl arbennek:
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            Prevalence
            • Universe consists of "Selenyum" on
              3 ⋅ 10-6%
            • Howl consists of "Selenyum" on
              ----
            • Oceans consists of "Selenyum" on
              4.5 ⋅ 10-6%
            • Human korf consists of "Selenyum" on
              2.140230508 ⋅ 10-5%
            • The an Norvys krestennen consists of "Selenyum" on
              5.0⋅ 10-6%
            • Meteorites konsystya of "Selenyum" on
              0.0013%