Bk-247, or Berkelium-247, is a synthetic radioactive isotope of the element Berkelium. It has an atomic number of 97 and is part of the actinide series in the periodic table. Bk-247 is produced through nuclear reactions, typically involving the bombardment of Californium-249 with neutrons. This isotope has a half-life of approximately 1,380 days, making it relatively stable compared to other isotopes of Berkelium. Bk-247 is primarily used in scientific research, particularly in studies related to nuclear chemistry and the properties of heavy elements. Its radioactivity allows researchers to explore various applications in fields such as medicine and materials science.