Lead |
Symbol | Pb |
---|---|
Latin name | Plumbum |
Atomic number | 82 |
Period | 6 |
Element category | Metals |
Relative atomic mass | 207.2 |
Group | IV.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 |