Protactinium vs Seaborgium

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PropertyPa ProtactiniumSg Seaborgium
Atomic number91106
SymbolPaSg
NameProtactiniumSeaborgium
Categoryactinidetransition-metal
Standard Atomic Weight231.03588 u271 u
Period77
GroupN/A6
Blockss
Phase at STPsolidN/A
Electron configuration[Rn]7s25f26d1[Rn]7s25f146d4
Oxidation states[2, 3, 4, 5][3, 4, 5, 6]
Electronegativity (Pauling)1.5N/A
Electron affinity0.123 eV0.85 eV
Density1.537000e+4 kg/m³3.500000e+4 kg/m³
Melting point1571.85 °C-273.15 °C
Boiling point-273.15 °C-273.15 °C
Discovery year19131974