Radioactive decay can be constituted-of-or-filled-with isotopes.Logical formLearned from4 sentences. Isotopes can be constituted-of-or-filled-with lithium.Logical formLearned from4 sentences. An isotope can be constituted-of-or-filled-with mass.Logical formLearned from4 sentences. A (carbon isotope excursion) can be negative.Logical formLearned from4 sentences. Some isotope can be constituted-of-or-filled-with element.Logical formLearned from4 sentences. Presence may pertain-to an isotope.Logical formLearned from4 sentences. Isotopes may be created.Logical formLearned from4 sentences. An isotope can be constituted-of-or-filled-with nickel.Logical formLearned from4 sentences. An isotope may be assigned.Logical formLearned from4 sentences. Isotopes may decay by (alpha decay).Logical formLearned from4 sentences. Isotopes can be constituted-of-or-filled-with seaborgium.Logical formLearned from4 sentences. A half-life of an isotope may be extracted.Logical formLearned from4 sentences. An activity may be assigned to some isotope.Logical formLearned from4 sentences. Isotopes can be constituted-of-or-filled-with curium.Logical formLearned from4 sentences. An isotope can be constituted-of-or-filled-with neon.Logical formLearned from4 sentences.