Strontium vs Nihonium

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PropertySr StrontiumNh Nihonium
Atomic number38113
SymbolSrNh
NameStrontiumNihonium
Categoryalkaline-earth-metalpost-transition-metal
Standard Atomic Weight87.62 u286 u
Period57
Group213
Blocksp
Phase at STPsolidsolid
Electron configuration[Kr]5s2[Rn] 5f14 6d10 7s2 7p1(predicted)
Oxidation states[1, 2]N/A
Electronegativity (Pauling)0.95N/A
Electron affinity0.052 eV0.6 eV
Density2640 kg/m³1.600000e+4 kg/m³
Melting point776.85 °C426.85 °C
Boiling point1381.85 °C1156.85 °C
Discovery year17922004