Boron vs Lead

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PropertyB BoronPb Lead
Atomic number582
SymbolBPb
NameBoronLead
Categorymetalloidpost-transition-metal
Standard Atomic Weight10.8135 u207.2 u
Period26
Group1314
Blockpp
Phase at STPsolidsolid
Electron configuration[He]2s22p1[Xe]6s24f145d106p2
Oxidation states[-5, -1, 0, 1, 2, 3][-4, -2, -1, 0, 1, 2, 3, 4]
Electronegativity (Pauling)2.042.33
Electron affinity0.27972 eV0.364 eV
Density2370 kg/m³1.134200e+4 kg/m³
Melting point2074.85 °C327.46 °C
Boiling point3999.85 °C1748.85 °C
Discovery year18082021