👉 Transuranic is a term that refers to elements with atomic numbers greater than 92. These are the most radioactive and unstable types of atoms, as they can undergo nuclear reactions that produce energy or release matter. For example: - Uranium (U) - Atomic number 94 - Thorium (Th) - Atomic number 90 These transuranic elements have a high atomic mass and are responsible for the majority of Earth's radioactive decay.