Some isotopes may have half-lives.Logical formLearned from9 sentences. An (isotope uranium-235) can be fissile.Logical formLearned from9 sentences. Tritium can be an isotope of hydrogen.Logical formLearned from9 sentences. A range can be constituted-of-or-filled-with isotopes.Logical formLearned from9 sentences. (Nitrogen isotopes) can be stable.Logical formLearned from9 sentences. Isotopes may undergo a separation.Logical formLearned from9 sentences. An isotope can be vaporous in point of a planet.Logical formLearned from9 sentences. An isotope can be about a helium.Logical formLearned from9 sentences. Isotopes can be for purposes.Logical formLearned from9 sentences. Isotopes may provide a tool.Logical formLearned from9 sentences. An isotope can be constituted-of-or-filled-with radon.Logical formLearned from9 sentences. Radioactive isotopes can be harmless.Logical formLearned from9 sentences. Radioactive isotopes may be measured.Logical formLearned from9 sentences. Radioactive isotopes may be ingested.Logical formLearned from9 sentences. Isotopes may undergo concentration.Logical formLearned from9 sentences.