Beryllium vs Seaborgium

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PropertyBe BerylliumSg Seaborgium
Atomic number4106
SymbolBeSg
NameBerylliumSeaborgium
Categoryalkaline-earth-metaltransition-metal
Standard Atomic Weight9.012183 u271 u
Period27
Group26
Blockss
Phase at STPsolidN/A
Electron configuration[He]2s2[Rn]7s25f146d4
Oxidation states[0, 1, 2][3, 4, 5, 6]
Electronegativity (Pauling)1.57N/A
Electron affinity-0.52 eV0.85 eV
Density1850 kg/m³3.500000e+4 kg/m³
Melting point1286.85 °C-273.15 °C
Boiling point2470.85 °C-273.15 °C
Discovery year17971974