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 produced artificially in laboratories or nuclear reactors. They include elements like neptunium, plutonium, and americium, which are used in various applications, including nuclear energy and medical treatments. The study of transuranium elements is important for understanding nuclear chemistry and physics. Many of these elements are radioactive, meaning they decay over time and emit radiation. This property makes them useful in certain technologies, but it also requires careful handling and disposal due to potential health risks.