Some era can be for isotopes.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with ununseptium.Logical formLearned from3 sentences. (Rutherfordium isotopes) may undergo a synthesis.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with lawrencium.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with vanadium.Logical formLearned from3 sentences. Some isotopes can be constituted-of-or-filled-with decay.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with silver.Logical formLearned from3 sentences. Atomic masses may pertain-to isotopes.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with caesium.Logical formLearned from3 sentences. (Xenon isotopes) can be radioactive.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with promethium.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with gadolinium.Logical formLearned from3 sentences. (Decay products) can be isotopes.Logical formLearned from3 sentences. Isotopes can be constituted-of-or-filled-with lutetium.Logical formLearned from3 sentences. Some isotopes can be constituted-of-or-filled-with iridium.Logical formLearned from3 sentences.