Protactinium vs Nihonium

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PropertyPa ProtactiniumNh Nihonium
Atomic number91113
SymbolPaNh
NameProtactiniumNihonium
Categoryactinidepost-transition-metal
Standard Atomic Weight231.03588 u286 u
Period77
GroupN/A13
Blocksp
Phase at STPsolidsolid
Electron configuration[Rn]7s25f26d1[Rn] 5f14 6d10 7s2 7p1(predicted)
Oxidation states[2, 3, 4, 5]N/A
Electronegativity (Pauling)1.5N/A
Electron affinity0.123 eV0.6 eV
Density1.537000e+4 kg/m³1.600000e+4 kg/m³
Melting point1571.85 °C426.85 °C
Boiling point-273.15 °C1156.85 °C
Discovery year19132004