| Fáìlì:Tc,43.jpg |
| Technetium |
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| Pípè | /tɛkˈniːʃiəm/ (tek-NEE-shee-əm) |
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| Ìhànsójú | Shiny gray metal |
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| nọ́mbà ìsújọ | [97] |
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| Technetium ní orí tábìlì àyè |
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| Nọ́mbà átọ̀mù (Z) | 43 |
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| Ẹgbẹ́ | group 7 |
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| Àyè | àyè 5 |
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| Àdìpọ̀ | Àdìpọ̀-d |
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| Ẹ̀ka ẹ́límẹ́ntì | Transition metal |
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| Ìtò ẹ̀lẹ́ktrọ́nù | [Kr] 4d5 5s2 |
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| Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 13, 2 |
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| Àwọn ohun ìní ara |
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| Ìfarahàn at STP | solid |
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| Ìgbà ìyọ́ | 2430 K (2157 °C, 3915 °F) |
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| Ígbà ìhó | 4538 K (4265 °C, 7709 °F) |
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| Kíki (near r.t.) | 11 g/cm3 |
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| Heat of fusion | 33.29 kJ/mol |
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| Heat of | 585.2 kJ/mol |
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| Molar heat capacity | 24.27 J/(mol·K) |
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pressure extrapolated| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
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| at T (K) | 2727 | 2998 | 3324 | 3726 | 4234 | 4894 |
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| Atomic properties |
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| Oxidation states | −3, −1, 0, +1,[1] +2, +3,[1] +4, +5, +6, +7 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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| Electronegativity | Pauling scale: 1.9 |
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| Atomic radius | empirical: 136 pm |
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| Covalent radius | 147±7 pm |
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 Color lines in a spectral rangeSpectral lines of technetium |
| Other properties |
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| Natural occurrence | from decay |
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| Crystal structure | hexagonal |
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| Speed of sound thin rod | 16,200 m/s (at 20 °C) |
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| Thermal conductivity | 50.6 W/(m·K) |
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| Magnetic ordering | Paramagnetic |
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| CAS Number | 7440-26-8 |
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| Main isotopes of technetium |
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| Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
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| 95mTc | syn | 61 d | ε | - | 95Mo | | γ | 0.204, 0.582,
0.835 | - | | IT | 0.0389, e | 95Tc | | 96Tc | syn | 4.3 d | ε | - | 96Mo | | γ | 0.778, 0.849,
0.812 | - | | 97Tc | syn | 2.6×106 y | ε | - | 97Mo | | 97mTc | syn | 91 d | IT | 0.965, e | 97Tc | | 98Tc | syn | 4.2×106 y | β− | 0.4 | 98Ru | | γ | 0.745, 0.652 | - | | 99Tc | trace | 2.111×105 y | β− | 0.294 | 99Ru | | 99mTc | syn | 6.01 h | IT | 0.142, 0.002 | 99Tc | | γ | 0.140 | - |
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Àdàkọ:Category-inline
| references |
