| Radionuklide | Nominativ, Singular | nominative case, singular | |
| Radionuklide | Genitiv, Singular | genitive case, singular | |
| Radionuklide | Dativ, Singular | dative case, singular | |
| Radionuklide | Akkusativ, Singular | accusative case, singular | |
| Radionukliden | Nominativ, Plural | nominative case, plural | |
| Radionukliden | Genitiv, Plural | genitive case, plural | |
| Radionukliden | Dativ, Plural | dative case, plural | |
| Radionukliden | Akkusativ, Plural | accusative case, plural |