A radioactive substance decays by 12% per year. If the initial mass is 500 grams, what mass remains after 5 years?

Sat, 09 May 2026 12:45:10 +0000

**Why the Decay of 12% Per Year Still Matters—A Deep Dive into Radioactive Substances** Ever wondered what happens to a 500-gram sample of a radioactive material no longer than five years?’s passes by? With growing interest in radiation safety, nuclear technology, and environmental health, the predictable decay of radioactive substances is a response people increasingly encounter—especially in science education, healthcare, and industrial safety. This process, often measured at a 12% annual loss, reflects real-world physics with clear, reliable patterns. Understanding how much remains after five years reveals more than just numbers—it sheds light on trust, longevity, and responsible stewardship. **Why A radioactive substance decays by 12% per year. If the initial mass is 500 grams, what mass remains after 5 years? is trending in science education and safety discussions** In the context of nuclear physics, annual decay rates quantify how much of a radioactive isotope diminishes over time due to natural instability. For a substance decaying 12% per year, only 88% remains each year—easy math over five years compounds this loss significantly. While public awareness often centers on harmful exposure, this decay example illustrates controlled radioactive behavior, vital in medical imaging, power generation, and radiation shielding.