What is the S.I. Unit of radioactivity ?
Radioactivity (song) the end. The second time it is followed by "I-S I-N T-H-E A-I-R F-O-R Y-O-U A-N-D M-E". Lyrically, the 1975 version of the song plays upon the meaning of its title, with the line "Discovered by Madame Curie". In fact, natural radioactivity was discovered by Henri Becquerel (and independently by Silvanus Thompson), while induced radioactivity by Irène Joliot-Curie, Marie Curie's daughter. Curie only coined the term. The song was re-recorded as a radically different version for "The Mix" album in 1991 and was issued as a single in an edited form with remixes by François Kevorkian and William Orbit. While
Environmental radioactivity of the event. These can be dated by a SHRIMP ion microprobe. One of the advantages of this method is that any sample provides two clocks, one based on uranium-235's decay to lead-207 with a half-life of about 703 million years, and one based on uranium-238's decay to lead-206 with a half-life of about 4.5 billion years, providing a built-in crosscheck that allows accurate determination of the age of the sample even if some of the lead has been lost. Environmental radioactivity Environmental radioactivity is produced by radioactive materials in the human environment. While some radioisotopes, such as strontium-90 (Sr)