Indium
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| Indium |
|
49In
|
|
|
| Ìhànsójú |
silvery lustrous gray
 |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
indium, In, 49 |
| Ìpèlóhùn |
/ˈɪndiəm/ IN-dee-əm |
| Ẹ̀ka ẹ́límẹ̀nti |
post-transition metal |
| Ẹgbẹ́, àsìkò, àdìpò |
13, 5, p |
| Ìwúwo átọ́mù |
114.818 |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Kr] 4d10 5s2 5p1
2, 8, 18, 18, 3 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
7.31 g·cm−3 |
| Liquid density at m.p. |
7.02 g·cm−3 |
| Melting point |
429.7485 K, 156.5985 °C, 313.8773 °F |
| Boiling point |
2345 K, 2072 °C, 3762 °F |
| Heat of fusion |
3.281 kJ·mol−1 |
| Heat of vaporization |
231.8 kJ·mol−1 |
| Molar heat capacity |
26.74 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
1196 |
1325 |
1485 |
1690 |
1962 |
2340 |
|
| Atomic properties |
| Oxidation states |
3, 2, 1 (amphoteric oxide) |
| Electronegativity |
1.78 (Pauling scale) |
| Ionization energies |
1st: 558.3 kJ·mol−1 |
| 2nd: 1820.7 kJ·mol−1 |
| 3rd: 2704 kJ·mol−1 |
| Atomic radius |
167 pm |
| Covalent radius |
142±5 pm |
| Van der Waals radius |
193 pm |
| Miscellanea |
| Crystal structure |
tetragonal
|
| Magnetic ordering |
diamagnetic[1] |
| Electrical resistivity |
(20 °C) 83.7 nΩ·m |
| Thermal conductivity |
81.8 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 32.1 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 1215 m·s−1 |
| Young's modulus |
11 GPa |
| Mohs hardness |
1.2 |
| Brinell hardness |
8.83 MPa |
| CAS registry number |
7440-74-6 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù indium |
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· r |
