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| radioactive elements | |||
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| radioelement; active element | |||
| radioactive element | |||
| radioactive element (a chemical element, not a nuclide) | |||
| éléments radioactifs: 18 phrases in 8 subjects |
| Chemistry | 1 |
| Electronics | 2 |
| Medical | 3 |
| Medical appliances | 1 |
| Natural sciences | 5 |
| Nuclear physics | 1 |
| Technology | 1 |
| Радиоактивное излучение | 4 |
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