Californium is a synthetic, transactinide metallic element found in the periodic table with atomic number 98. It is characterized by being highly radioactive, primarily decaying through alpha emission, which generates significant quantities of neutrons. Due to its high instability and the intensive energy requirements needed for its creation, it is generally only produced in specialized research facilities using particle accelerators. The element's study contributes to understanding the stability limits of the nuclear structure and the complex decay chains of superheavy elements. Its unique physical and nuclear properties make it a subject of fundamental research in the fields of nuclear chemistry and particle physics.