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|
Antimony (Stibium)
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Sb | 51 | 121.760 | 630.63 °C | 1587 °C | Solid | 6.697 g/cm3 | Semi-Metal  |
|
|
|
| General |
| Name, Symbol, Number |
antimony, Sb, 51 |
| Chemical series |
metalloids |
| Group, Period, Block |
15, 5, p |
| Appearance |
silvery lustrous grey
 |
| Standard atomic weight |
121.760(1) g·mol−1 |
| Electron configuration |
[Kr] 4d10 5s2 5p3 |
| Electrons per shell |
2, 8, 18, 18, 5 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
6.697 g·cm−3 |
| Liquid density at m.p. |
6.53 g·cm−3 |
| Melting point |
903.78 K
(630.63 °C, 1167.13 °F) |
| Boiling point |
1860 K
(1587 °C, 2889 °F) |
| Heat of fusion |
19.79 kJ·mol−1 |
| Heat of vaporization |
193.43 kJ·mol−1 |
| Heat capacity |
(25 °C) 25.23 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
807 |
876 |
1011 |
1219 |
1491 |
1858 |
|
| Atomic properties |
| Crystal structure |
rhombohedral |
| Oxidation states |
−3, 3, 5 |
| Electronegativity |
2.05 (scale Pauling) |
Ionization energies
(more) |
1st: 834 kJ·mol−1 |
| 2nd: 1594.9 kJ·mol−1 |
| 3rd: 2440 kJ·mol−1 |
| Atomic radius |
145 pm |
| Atomic radius (calc.) |
133 pm |
| Covalent radius |
138 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Electrical resistivity |
(20 °C) 417 n Ω·m |
| Thermal conductivity |
(300 K) 24.4 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 11.0 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 3420 m/s |
| Young's modulus |
55 GPa |
| Shear modulus |
20 GPa |
| Bulk modulus |
42 GPa |
| Mohs hardness |
3.0 |
| Brinell hardness |
294 MPa |
| CAS registry number |
7440-36-0 |
| Selected isotopes |
|
|
| References |
|
Antimony Compounds
|
Source: Wikipedia article Antimony
|
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Chemistry Quick Facts
