Specific activity Specific activity Specific activity is the activity per quantity of a radionuclide and is a physical property of that radionuclide. Activity is a quantity related to radioactivity. The SI unit of activity is the becquerel (Bq), equal to one reciprocal second. The becquerel is defined as the number of radioactive transformations per second that occur in a particular radioactive isotope. Its related non-SI unit equivalent is the Curie (Ci) which is transformations per second. Since the probability of radioactive decay for a given radionuclide is a fixed physical quantity (with some slight exceptions, see changing decay rates), the number of
Radioactivity (song) film "Alice in Galaxy" and the 2010 documentary "Into Eternity". The song, as did other songs from "Radio-Activity", appeared in the Brazilian telenovela "Saramandaia". "Radioactivity" was re-issued 1991 as a single from Kraftwerk's remix album "The Mix". Featuring remixes by François Kevorkian and William Orbit. Fatboy Slim covered "Radioactivity" on his compilation album "". The song was released as a limited edition 7-inch single. Radioactivity (song) "Radioactivity" () is a song by the German electronic music band Kraftwerk, featuring Emil Schult. It was released in May 1976 as the lead and only single from their fifth studio album, "Radio-Activity" (1975).