Arsenic vs Lead

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PropertyAs ArsenicPb Lead
Atomic number3382
SymbolAsPb
NameArsenicLead
Categorymetalloidpost-transition-metal
Standard Atomic Weight74.921595 u207.2 u
Period46
Group1514
Blockpp
Phase at STPsolidsolid
Electron configuration[Ar]4s23d104p3[Xe]6s24f145d106p2
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5][-4, -2, -1, 0, 1, 2, 3, 4]
Electronegativity (Pauling)2.182.33
Electron affinity0.81 eV0.364 eV
Density5776 kg/m³1.134200e+4 kg/m³
Melting point816.85 °C327.46 °C
Boiling point613.85 °C1748.85 °C
Discovery year12502021