Nuclear isomers (e.g., Uranium-X and Uranium-Z) are a unique class of radioactive species discovered — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

Nuclear isomers are atomic nuclei with the same number of protons and neutrons (same $Z$ and $A$) but different nuclear energy states (one ground, one metastable/excited). This causes them to exhibit significantly different radioactive properties (e.g., different half-lives).