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Tin (Stannum)
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Sn | 50 | 118.710 | 231.93 °C | 2602 °C | Solid | 7.287 g/cm3 | Metal |
|
|
|
| General |
| Name, Symbol, Number |
tin, Sn, 50 |
| Chemical series |
poor metals |
| Group, Period, Block |
14, 5, p |
| Appearance |
silvery lustrous gray
 |
| Standard atomic weight |
118.710(7) g·mol−1 |
| Electron configuration |
[Kr] 4d10 5s2 5p2 |
| Electrons per shell |
2, 8, 18, 18, 4 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
(white) 7.265 g·cm−3 |
| Density (near r.t.) |
(gray) 5.769 g·cm−3 |
| Liquid density at m.p. |
6.99 g·cm−3 |
| Melting point |
505.08 K
(231.93 °C, 449.47 °F) |
| Boiling point |
2875 K
(2602 °C, 4716 °F) |
| Heat of fusion |
(white) 7.03 kJ·mol−1 |
| Heat of vaporization |
(white) 296.1 kJ·mol−1 |
| Heat capacity |
(25 °C) (white)
27.112 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
1497 |
1657 |
1855 |
2107 |
2438 |
2893 |
|
| Atomic properties |
| Crystal structure |
tetragonal |
| Oxidation states |
4, 2
(amphoteric oxide) |
| Electronegativity |
1.96 (scale Pauling) |
Ionization energies
(more) |
1st: 708.6 kJ·mol−1 |
| 2nd: 1411.8 kJ·mol−1 |
| 3rd: 2943.0 kJ·mol−1 |
| Atomic radius |
145 pm |
| Atomic radius (calc.) |
145 pm |
| Covalent radius |
141 pm |
| Van der Waals radius |
217 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Electrical resistivity |
(0 °C) 115 nΩ·m |
| Thermal conductivity |
(300 K) 66.8 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 22.0 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(r.t.) (rolled) 2730 m·s−1 |
| Young's modulus |
50 GPa |
| Shear modulus |
18 GPa |
| Bulk modulus |
58 GPa |
| Poisson ratio |
0.36 |
| Mohs hardness |
1.5 |
| Brinell hardness |
51 MPa |
| CAS registry number |
7440-31-5 |
| Selected isotopes |
|
|
| References |
|
Tin Compounds
|
Source: Wikipedia article Tin
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Chemistry Quick Facts
