| 31. | It is labeled with a radioisotope, technetium-99m ( 99m Tc ).
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| 32. | Technetium-99m has several features that make it safer than other possible isotopes.
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| 33. | Technetium stars belong to the classes variable stars of the long period variable types.
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| 34. | :The obvious explanation is because non-metallic Technetium doesn't exist.
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| 35. | The actual separation of technetium-99 from spent nuclear fuel is a long process.
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| 36. | Technetium-99 is used as a gamma ray-free source of beta particles.
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| 37. | Plutonium, neptunium, iodine and technetium decay much more slowly and are not strong emitters.
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| 38. | Many of technetium's properties were predicted by Dmitri Mendeleev before the element was discovered.
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| 39. | Technetium-99 is used as a gamma-ray-free source of beta particles.
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| 40. | Metallic technetium slowly tarnishes in moist air and, in powder form, burns in oxygen.
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