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| active element | |||
| radioactive element | |||
| radioelement | |||
| radioactive element (a chemical element, not a nuclide) | |||
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| radioelement An element that is naturally radioactive; radioelement | |||
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| radioactive elements | |||
| radioaktives Element: 13 phrases in 5 subjects |
| Electronics | 4 |
| General | 1 |
| Mining | 1 |
| Nuclear physics | 3 |
| Радиоактивное излучение | 4 |