Selenium vs Platinum

← Back to Periodic Table
PropertySe SeleniumPt Platinum
Atomic number3478
SymbolSePt
NameSeleniumPlatinum
Categorynonmetaltransition-metal
Standard Atomic Weight78.971 u195.084 u
Period46
Group1610
Blockps
Phase at STPsolidsolid
Electron configuration[Ar]4s23d104p4[Xe]6s14f145d9
Oxidation states[-2, -1, 0, 1, 2, 3, 4, 5, 6][-3, -2, -1, 0, 1, 2, 3, 4, 5, 6]
Electronegativity (Pauling)2.552.28
Electron affinity2.0206 eV2.1228 eV
Density4809 kg/m³2.146000e+4 kg/m³
Melting point220.5 °C1768.4 °C
Boiling point684.85 °C3824.85 °C
Discovery year18171735