Isotopes can be stable.Logical formLearned from6 sentences. Isotopes can be constituted-of-or-filled-with strontium.Logical formLearned from6 sentences. An isotope may be produced.Logical formLearned from6 sentences. An isotope can be stable.Logical formLearned from6 sentences. A (hydrogen isotope) can be radioactive.Logical formLearned from6 sentences. Isotopes may be knowned.Logical formLearned from6 sentences. Tritium can be an isotope.Logical formLearned from6 sentences. An (isotope producer) may be denied.Logical formLearned from6 sentences. Isotopes may pertain-to a male.Logical formLearned from6 sentences. An isotope may undergo a separation.Logical formLearned from6 sentences. Ones can be stable isotopes.Logical formLearned from6 sentences. Isotopes can be in precipitation.Logical formLearned from6 sentences. Stable isotope may undergo an application.Logical formLearned from6 sentences. A capital may make isotopes.Logical formLearned from6 sentences. Containers can be with (radio isotopes).Logical formLearned from6 sentences.