| Antimony |
|
51Sb
|
|
|
| Ìhànsójú |
silvery lustrous gray
 |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
antimony, Sb, 51 |
| Ẹ̀ka ẹ́límẹ̀nti |
metalloid |
| Ẹgbẹ́, àsìkò, àdìpò |
15, 5, p |
| Ìwúwo átọ́mù |
121.760(1) |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Kr] 4d10 5s2 5p3
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 |
| Molar heat capacity |
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 |
| Oxidation states |
5, 3, -3 |
| Electronegativity |
2.05 (Pauling scale) |
Ionization energies
(more) |
1st: 834 kJ·mol−1 |
| 2nd: 1594.9 kJ·mol−1 |
| 3rd: 2440 kJ·mol−1 |
| Atomic radius |
140 pm |
| Covalent radius |
139±5 pm |
| Van der Waals radius |
206 pm |
| Miscellanea |
| Crystal structure |
rhombohedral
|
| Magnetic ordering |
diamagnetic[1] |
| Electrical resistivity |
(20 °C) 417 nΩ·m |
| Thermal conductivity |
24.4 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 11 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 3420 m·s−1 |
| 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 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù antimony |
|
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· r |
Antimony (Látìnì: stibium) is a chemical element with symbol Sb and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead. It was established to be an element around the 17th century.
