You are surrounded by radioactive isotopes. However, many don't pose much of a threat because they have such long half-lives. The half-life of a radioactive isotope is the time it takes for half of the sample to react, or decay. This time can range anywhere from a portion of a seco...
What determines whether an isotope is radioactive or not? How many leap years in 100 years? What is radioactive dating? How many leap years have there been? A particular radioactive isotope has a half-life of 200 years. How long will it take this isotope to give off all of its radiati...
The deviation from secular equilibrium between the natural radionuclide 210Po (half-life: 138.4 d) and its radioactive grandparent 210Pb (half-life: 22.3 y) has been used to examine particle export from the surface ocean. Here we combine 210Po and 210Pb activity results from three GEOTRACES ...