Radium-228 is a radioactive isotope of radium that occurs naturally in the decay chain of uranium-232. It has a half-life of about 5.75 years, meaning it takes this amount of time for half of a sample to decay into its daughter isotope, actinium-228. This isotope emits alpha particles and gamma radiation, making it a subject of interest in both scientific research and health studies. Due to its radioactivity, exposure to Radium-228 can pose health risks, particularly if ingested or inhaled, necessitating careful handling and monitoring in environments where it is present.