Technetium-98 is a radioactive isotope of the element technetium, which has the atomic number 43. It is produced through the decay of molybdenum-98 and has a half-life of about 4.2 million years. Technetium-98 is not found in significant amounts in nature and is primarily created in nuclear reactors. This isotope is of interest in scientific research and has potential applications in nuclear medicine. However, due to its long half-life and radioactive properties, handling technetium-98 requires safety precautions to minimize exposure to radiation.