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General information about Technetium |
| Technetium |
| Tc |
| 43 |
| Transition Metals |
| 7 |
| 5 |
| d |
| silvery gray metal |
| [98] g·mol-1 |
1s2 2s2p6 3s2p6d10
4s2p6d5 5s2 |
| 2, 8, 18, 13, 2 |
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Physical properties of Technetium |
| solid |
| 11 g·cm-3 |
| 2430(K),
2157°C, 3915°F |
| 4538(K),
4265°C, 7709°F |
| ? |
| ? |
| 33.29 kJ·mol-1 |
| 585.2 kJ·mol-1 |
| 24.27 J·mol-1·K-1 |
| 1.9 (Pauling scale) |
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Atomic structure of Technetium |
| 1.95 Å |
| 8.5 cm³/mol |
| 1.27 Å |
| 20 |
| Hexagonal |
| 56 (+7e) |
| 4d6 |
| 43 |
| 55 |
| 43 |
| 7 |
| 4d6 5s1 |
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Electron dot
model |
Other languages |
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| Latin: |
Technetium |
| Czech: |
Technecium |
| Croatian: |
Tehnecij |
| French: |
Technetium |
| German: |
Technetium - s |
| Italian: |
Tecneto |
| Norwegian: |
Technetium |
| Portuguese: |
Tecnécio |
| Spanish: |
Tecnecio |
| Swedish: |
Teknetium |
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| Element |
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Brief description |
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Technetium is a silvery-gray metal that tarnishes slowly in moist air. Common oxidation states are +7, +5, and +4. The chemistry of technetium is similar to that of rhenium. Technetium is a corrosion inhibitor for steel and is an excellent superconductor at 11K and below.
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Uses of Technetium |
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Technetium-99 is used in many medical radioactive isotope tests. Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity.
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Hystory of Technetium |
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- Discoverer: Carlo Perrier, Emillo G. Segre
- Discovery Location: Italy
- Discovery Year: 1937
- Name Origin: Greek: technêtos - artificial
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