Explanation:
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation wikipedia
half life is the time it takes something radioactive be gone halfway
Radiometric dating is the method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.
radioactivity affects Earth’s interior by keeping it liquid and hot
The outer core is molten and liquid iron and nickel, while the inner core is solid and much more dense than either iron or nickel at the surface
