Reference, Questions and Help => Nuke Q&A => Definitions => Topic started by: Rennhack on Nov 25, 2005, 01:24
Title: Radium (Ra)
Post by: Rennhack on Nov 25, 2005, 01:24
A radioactive metallic element with atomic number 88. As found in nature, the most common isotope has a mass number of 226. It occurs in minute quantities associated with uranium in pitchblende, camotite, and other minerals.