A source may pertain-to a radioactive isotope.Logical formLearned from4 sentences. Radioactive isotopes can be unstable.Logical formLearned from4 sentences. Radioactive isotopes may undergo a development.Logical formLearned from4 sentences. A (carbon isotope test) can be reliable.Logical formLearned from4 sentences. A (carbon isotope test) may undergo a use.Logical formLearned from4 sentences. A (radioactive isotope) can be toxic.Logical formLearned from4 sentences. An isotope can be rare.Logical formLearned from4 sentences. An isotope can be constituted-of-or-filled-with iron.Logical formLearned from4 sentences. A builder can be exposed to isotopes.Logical formLearned from4 sentences. A (federal government) may encourage a distribution of (plutonium isotopes).Logical formLearned from4 sentences. (Plutonium isotopes) may undergo a distribution.Logical formLearned from4 sentences. A deposit can be constituted-of-or-filled-with isotopes.Logical formLearned from4 sentences. An isotope may be created by testing of nuclear bombs.Logical formLearned from4 sentences. Antibodies may be attached to radioactive isotopes.Logical formLearned from4 sentences. Isotopes may deca at a rate.Logical formLearned from4 sentences.