Beryllium vs Lead

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PropertyBe BerylliumPb Lead
Atomic number482
SymbolBePb
NameBerylliumLead
Categoryalkaline-earth-metalpost-transition-metal
Standard Atomic Weight9.012183 u207.2 u
Period26
Group214
Blocksp
Phase at STPsolidsolid
Electron configuration[He]2s2[Xe]6s24f145d106p2
Oxidation states[0, 1, 2][-4, -2, -1, 0, 1, 2, 3, 4]
Electronegativity (Pauling)1.572.33
Electron affinity-0.52 eV0.364 eV
Density1850 kg/m³1.134200e+4 kg/m³
Melting point1286.85 °C327.46 °C
Boiling point2470.85 °C1748.85 °C
Discovery year17972021