SymbolPb
Latin namePlumbum
Atomic number82
Period6
Element categoryMetals
Relative atomic mass207.2
GroupIV.A
Electronegativity
1.8
Oxidation numbers
2, 4
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p2
Density [g/cm3]
11.35
State
Solid
Melting point [°C]
323.50
Boiling point [°C]
1740
Atomic radius [pm]
154
Covalent radius [pm]
147
Thermal conductivity [W m-1K-1]
35.3
Heat capacity [J K-1g-1]
0.129
Discovery
Antiquity
Hardness [Mohs scale]
1.5
Brinell hardness [MPa]
38.3
Young's modulus [GPa]
16
Electrical conductivity [S m-1]
4.8 · 106
Electrical resistivity [10-6Ω.m]
0.206
Shear modulus [GPa]
5.6
1.st ionization energy [eV]
7.4167
2.nd ionization energy [eV]
15.028
3.rd ionization energy [eV]
31.943
Stable isotopes
4
Unstable isotopes
24