Curium vs Nihonium

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PropertyCm CuriumNh Nihonium
Atomic number96113
SymbolCmNh
NameCuriumNihonium
Categoryactinidepost-transition-metal
Standard Atomic Weight247 u286 u
Period77
GroupN/A13
Blocksp
Phase at STPsolidsolid
Electron configuration[Rn]7s25f76d1[Rn] 5f14 6d10 7s2 7p1(predicted)
Oxidation states[3, 4, 5, 6]N/A
Electronegativity (Pauling)1.3N/A
Electron affinity0.277 eV0.6 eV
Density1.351000e+4 kg/m³1.600000e+4 kg/m³
Melting point1344.85 °C426.85 °C
Boiling point3126.85 °C1156.85 °C
Discovery year19442004