Strontium vs Seaborgium

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PropertySr StrontiumSg Seaborgium
Atomic number38106
SymbolSrSg
NameStrontiumSeaborgium
Categoryalkaline-earth-metaltransition-metal
Standard Atomic Weight87.62 u271 u
Period57
Group26
Blockss
Phase at STPsolidN/A
Electron configuration[Kr]5s2[Rn]7s25f146d4
Oxidation states[1, 2][3, 4, 5, 6]
Electronegativity (Pauling)0.95N/A
Electron affinity0.052 eV0.85 eV
Density2640 kg/m³3.500000e+4 kg/m³
Melting point776.85 °C-273.15 °C
Boiling point1381.85 °C-273.15 °C
Discovery year17921974