Selenium vs Molybdenum

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PropertySe SeleniumMo Molybdenum
Atomic number3442
SymbolSeMo
NameSeleniumMolybdenum
Categorynonmetaltransition-metal
Standard Atomic Weight78.971 u95.95 u
Period45
Group166
Blockps
Phase at STPsolidsolid
Electron configuration[Ar]4s23d104p4[Kr]5s14d5
Oxidation states[-2, -1, 0, 1, 2, 3, 4, 5, 6][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6]
Electronegativity (Pauling)2.552.16
Electron affinity2.0206 eV0.744 eV
Density4809 kg/m³1.020000e+4 kg/m³
Melting point220.5 °C2622.85 °C
Boiling point684.85 °C4638.85 °C
Discovery year18171778