ChemistFella

Selenium (Se)

Element number 34, from the nonmetals family.

Mix Selenium in the lab 🧪

Selenium facts

Symbol
Se
Atomic number
34
Atomic mass
78.971
Family
Nonmetals
Period
4
Group
16

What does selenium react with?

Selenium makes a new substance with 43 other elements and chemicals in our lab:

  • Selenium + HydrogenHydrogen selenide H₂ + Se → H₂Se · When heated · Try it
  • Selenium + LithiumLithium selenide 2Li + Se → Li₂Se · When heated · Try it
  • Selenium + OxygenSelenium dioxide Se + O₂ → SeO₂ · When heated · Try it
  • Selenium + FluorineSelenium hexafluoride Se + 3F₂ → SeF₆ · At room temperature · Try it
  • Selenium + SodiumSodium selenide 2Na + Se → Na₂Se · When heated · Try it
  • Selenium + MagnesiumMagnesium selenide Mg + Se → MgSe · When heated · Try it
  • Selenium + AluminiumAluminium selenide 2Al + 3Se → Al₂Se₃ · When heated · Try it
  • Selenium + PhosphorusTetraphosphorus triselenide 4P + 3Se → P₄Se₃ · When heated · Try it
  • Selenium + ChlorineSelenium tetrachloride Se + 2Cl₂ → SeCl₄ · When heated · Try it
  • Selenium + PotassiumPotassium selenide 2K + Se → K₂Se · When heated · Try it
  • Selenium + CalciumCalcium selenide Ca + Se → CaSe · When heated · Try it
  • Selenium + TitaniumTitanium(IV) selenide Ti + 2Se → TiSe₂ · When heated · Try it
  • Selenium + ManganeseManganese(II) selenide Mn + Se → MnSe · When heated · Try it
  • Selenium + IronIron(II) selenide Fe + Se → FeSe · When heated · Try it
  • Selenium + NickelNickel(II) selenide Ni + Se → NiSe · When heated · Try it
  • Selenium + CopperCopper(I) selenide 2Cu + Se → Cu₂Se · When heated · Try it
  • Selenium + ZincZinc selenide Zn + Se → ZnSe · When heated · Try it
  • Selenium + GalliumGallium selenide 2Ga + 3Se → Ga₂Se₃ · When heated · Try it
  • Selenium + GermaniumGermanium selenide Ge + 2Se → GeSe₂ · When heated · Try it
  • Selenium + ArsenicArsenic triselenide 2As + 3Se → As₂Se₃ · When heated · Try it
  • Selenium + BromineSelenium tetrabromide Se + 2Br₂ → SeBr₄ · At room temperature · Try it
  • Selenium + RubidiumRubidium selenide 2Rb + Se → Rb₂Se · When heated · Try it
  • Selenium + StrontiumStrontium selenide Sr + Se → SrSe · When heated · Try it
  • Selenium + YttriumYttrium selenide 2Y + 3Se → Y₂Se₃ · When heated · Try it
  • Selenium + MolybdenumMolybdenum(IV) selenide Mo + 2Se → MoSe₂ · When heated · Try it
  • Selenium + SilverSilver selenide 2Ag + Se → Ag₂Se · When heated · Try it
  • Selenium + CadmiumCadmium selenide Cd + Se → CdSe · When heated · Try it
  • Selenium + IndiumIndium selenide 2In + 3Se → In₂Se₃ · When heated · Try it
  • Selenium + TinTin(II) selenide Sn + Se → SnSe · When heated · Try it
  • Selenium + AntimonyAntimony(III) selenide 2Sb + 3Se → Sb₂Se₃ · When heated · Try it
  • Selenium + CaesiumCaesium selenide 2Cs + Se → Cs₂Se · When heated · Try it
  • Selenium + BariumBarium selenide Ba + Se → BaSe · When heated · Try it
  • Selenium + LanthanumLanthanum selenide 2La + 3Se → La₂Se₃ · When heated · Try it
  • Selenium + CeriumCerium(III) selenide 2Ce + 3Se → Ce₂Se₃ · When heated · Try it
  • Selenium + PraseodymiumPraseodymium selenide 2Pr + 3Se → Pr₂Se₃ · When heated · Try it
  • Selenium + NeodymiumNeodymium selenide 2Nd + 3Se → Nd₂Se₃ · When heated · Try it
  • Selenium + SamariumSamarium(III) selenide 2Sm + 3Se → Sm₂Se₃ · When heated · Try it
  • Selenium + EuropiumEuropium(II) selenide Eu + Se → EuSe · When heated · Try it
  • Selenium + GadoliniumGadolinium selenide 2Gd + 3Se → Gd₂Se₃ · When heated · Try it
  • Selenium + TungstenTungsten(IV) selenide W + 2Se → WSe₂ · When heated · Try it
  • Selenium + MercuryMercury(II) selenide Hg + Se → HgSe · When heated · Try it
  • Selenium + LeadLead(II) selenide Pb + Se → PbSe · When heated · Try it
  • Selenium + BismuthBismuth(III) selenide 2Bi + 3Se → Bi₂Se₃ · When heated · Try it

Nothing happens when it's simply mixed with 55 of the others. 21 pairings have never been tried, because not enough atoms have ever existed.