Transuranium elements are chemical elements that have an atomic number greater than that of uranium, which is 92. These elements are not found naturally on Earth and are typically created in laboratories or nuclear reactors through nuclear reactions. They include elements like neptunium, plutonium, and americium. Due to their instability, transuranium elements are often radioactive and have relatively short half-lives. They are used in various applications, including nuclear energy, medical treatments, and scientific research. The study of these elements helps scientists understand nuclear processes and the behavior of matter under extreme conditions.