Strontium vs Oganesson

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PropertySr StrontiumOg Oganesson
Atomic number38118
SymbolSrOg
NameStrontiumOganesson
Categoryalkaline-earth-metalnoble-gas
Standard Atomic Weight87.62 u294 u
Period57
Group218
Blocksp
Phase at STPsolidgas
Electron configuration[Kr]5s2[Rn] 7s2 7p6 5f14 6d10(predicted)
Oxidation states[1, 2][-1, 0, 1, 2, 4, 6]
Electronegativity (Pauling)0.95N/A
Electron affinity0.052 eV0.056 eV
Density2640 kg/m³7000 kg/m³
Melting point776.85 °C-273.15 °C
Boiling point1381.85 °C-243.15 °C
Discovery year17922006