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|
Lead (Plumbum)
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Pb | 82 | 207.2 | 327.46 °C | 1749 °C | Solid | 11.34 g/cm3 | Metal  |
|
|
|
| General |
| Name, Symbol, Number |
lead, Pb, 82 |
| Chemical series |
Post-transition metals or poor metals |
| Group, Period, Block |
14, 6, p |
| Appearance |
bluish gray
 |
| Standard atomic weight |
207.2(1) g·mol−1 |
| Electron configuration |
[Xe] 4f14 5d10 6s2 6p2 |
| Electrons per shell |
2, 8, 18, 32, 18, 4 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
11.34 g·cm−3 |
| Liquid density at m.p. |
10.66 g·cm−3 |
| Melting point |
600.61 K
(327.46 °C, 621.43 °F) |
| Boiling point |
2022 K
(1749 °C, 3180 °F) |
| Heat of fusion |
4.77 kJ·mol−1 |
| Heat of vaporization |
179.5 kJ·mol−1 |
| Heat capacity |
(25 °C) 26.650 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
978 |
1088 |
1229 |
1412 |
1660 |
2027 |
|
| Atomic properties |
| Crystal structure |
cubic face centered |
| Oxidation states |
4, 2
(Amphoteric oxide) |
| Electronegativity |
2.33 (scale Pauling) |
Ionization energies
(more) |
1st: 715.6 kJ·mol−1 |
| 2nd: 1450.5 kJ·mol−1 |
| 3rd: 3081.5 kJ·mol−1 |
| Atomic radius |
180 pm |
| Atomic radius (calc.) |
154 pm |
| Covalent radius |
147 pm |
| Van der Waals radius |
202 pm |
| Miscellaneous |
| Magnetic ordering |
diamagnetic |
| Electrical resistivity |
(20 °C) 208 n Ω·m |
| Thermal conductivity |
(300 K) 35.3 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 28.9 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(r.t.) (annealed)
1190 m·s−1 |
| Young's modulus |
16 GPa |
| Shear modulus |
5.6 GPa |
| Bulk modulus |
46 GPa |
| Poisson ratio |
0.44 |
| Mohs hardness |
1.5 |
| Brinell hardness |
38.3 MPa |
| CAS registry number |
7439-92-1 |
| Selected isotopes |
|
|
| References |
|
Lead Compounds
|
Source: Wikipedia article Lead
|
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Chemistry Quick Facts
