Marie Curie – A new radioactive substance Share this quote: The various reasons which we have enumerated lead us to believe that the new radioactive substance contains a new element to which we propose to give the name of radium. – Marie Curie (1867-1934) Is this quotation insightful, though-provoking, useful? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0