What is Radioactivity? How is it measured? What is Half-Life?Learn with kimavi in just one minute! Radioactivity is the process in which unstable atomic nuclei emit radiation in the form of alpha or beta particles, or gamma rays. It is measured in a unit called the Becquerel (Bq), which is equal to one decay event per second. Half-life is the time taken for half of the radioactive material to decay. Different elements have different half-lives, ranging from fractions of a second to millions of years. Radioactivity is used in medical imaging, such as X-rays, PET scans and CT scans. It is also used in radiotherapy to treat cancer. Radioactivity can also be used to date ancient artifacts and geological samples. Thank you for reading. Create summary videos with Kimavi.