Technetium
Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
| Technetium |
|
43Tc
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|
| Ìhànsójú |
Shiny gray metal
250px |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
technetium, Tc, 43 |
| Ìpèlóhùn |
/tɛkˈniːʃiəm/
tek-NEE-shee-əm |
| Ẹ̀ka ẹ́límẹ̀nti |
transition metal |
| Ẹgbẹ́, àsìkò, àdìpò |
7, 5, d |
| Ìwúwo átọ́mù |
98(0) |
| Ìtòléra ẹ̀lẹ́ktrónì |
Kr 4d5 5s2
2, 8, 18, 13, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
11 g·cm−3 |
| Melting point |
2430 K, 2157 °C, 3915 °F |
| Boiling point |
4538 K, 4265 °C, 7709 °F |
| Heat of fusion |
33.29 kJ·mol−1 |
| Heat of vaporization |
585.2 kJ·mol−1 |
| Molar heat capacity |
24.27 J·mol−1·K−1 |
| Vapor pressure extrapolated |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
2727 |
2998 |
3324 |
3726 |
4234 |
4894 |
|
| Atomic properties |
| Oxidation states |
7, 6, 5, 4, 3,[1] 2, 1[2], -1, -3
(strongly acidic oxide) |
| Electronegativity |
1.9 (Pauling scale) |
| Ionization energies |
1st: 702 kJ·mol−1 |
| 2nd: 1470 kJ·mol−1 |
| 3rd: 2850 kJ·mol−1 |
| Atomic radius |
136 pm |
| Covalent radius |
147±7 pm |
| Miscellanea |
| Crystal structure |
hexagonal
|
| Magnetic ordering |
Paramagnetic |
| Thermal conductivity |
50.6 W·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 16,200 m·s−1 |
| CAS registry number |
7440-26-8 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù technetium |
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