Selenium vs Rhodium

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PropertySe SeleniumRh Rhodium
Atomic number3445
SymbolSeRh
NameSeleniumRhodium
Categorynonmetaltransition-metal
Standard Atomic Weight78.971 u102.9055 u
Period45
Group169
Blockps
Phase at STPsolidsolid
Electron configuration[Ar]4s23d104p4[Kr]5s14d8
Oxidation states[-2, -1, 0, 1, 2, 3, 4, 5, 6][-3, -1, 1, 2, 3, 4, 5, 6, 7]
Electronegativity (Pauling)2.552.28
Electron affinity2.0206 eV1.137 eV
Density4809 kg/m³1.240000e+4 kg/m³
Melting point220.5 °C1963.85 °C
Boiling point684.85 °C3694.85 °C
Discovery year18171803