What is the most radioactive element?

Answer : Francium (Fr) or radium are widely regarded as the most radioactive elements (Ra). These two elements both have short half-lives, significant levels of radioactivity, and are extremely unstable. A rare and extremely unstable metal with a half-life of about 22 minutes, francium is present in nature in trace amounts. With a half-life of 1600 years, radium is a radioactive metal that is found naturally in some rocks and soils. Both francium and radium release alpha, beta, and gamma radiation, which if consumed or inhaled by people poses a serious risk to their health.