An isotope may decay.Logical formLearned from12 sentences. Isotopes can be with mass numbers.Logical formLearned from12 sentences. Isotopes may undergo a decay.Logical formLearned from12 sentences. Isotopes may be needed for purposes.Logical formLearned from12 sentences. A supply can be constituted-of-or-filled-with isotopes.Logical formLearned from12 sentences. A (radioactive isotope) can be polonium-210.Logical formLearned from12 sentences. Isotopes can be for medical use.Logical formLearned from12 sentences. Isotopes may undergo measurements.Logical formLearned from12 sentences. (Oxygen isotopes) can be stable.Logical formLearned from11 sentences. Isotopes may be produced.Logical formLearned from11 sentences. Isotopes may undergo applications.Logical formLearned from11 sentences. Stable isotopes can be constituted-of-or-filled-with oxygen.Logical formLearned from11 sentences. Isotopes may undergo a production.Logical formLearned from11 sentences. Isotopes can be poisonous.Logical formLearned from11 sentences. A radioactive isotope may undergo a decay.Logical formLearned from11 sentences.