Radioactive isotopes may be injected into patients.Logical formLearned from6 sentences. A supply may pertain-to isotopes.Logical formLearned from6 sentences. Radioactive isotopes can be for purposes.Logical formLearned from6 sentences. Poisoning can be by an (isotope polonium-210).Logical formLearned from6 sentences. A portion may pertain-to an isotope.Logical formLearned from6 sentences. A (research reactor) can be for medical isotopes.Logical formLearned from6 sentences. Levels may pertain-to an (isotope polonium).Logical formLearned from6 sentences. An isotope may be used.Logical formLearned from6 sentences. (Xenon isotopes) may undergo concentrations.Logical formLearned from5 sentences. Some isotopes may occur.Logical formLearned from5 sentences. Isotopes can be by diffusion.Logical formLearned from5 sentences. Some isotopes can be constituted-of-or-filled-with neon.Logical formLearned from5 sentences. An isotope can be constituted-of-or-filled-with radium.Logical formLearned from5 sentences. An isotope can be unstable.Logical formLearned from5 sentences. (Hydrogen isotopes) may undergo a fusion.Logical formLearned from5 sentences.