Commonly used gamma-emitting isotopes

Gamma-emitting isotopes are like tiny pieces of material that give off special rays of light called gamma rays. Gamma rays are a type of energy that is very useful for looking inside things that we can't see with our eyes, like our bodies or even rocks.

Scientists use different kinds of gamma-emitting isotopes for different things. One of the most common ones is called Technetium-99m. It's used in a medical test called a "nuclear medicine scan" which helps doctors see certain parts of the body like the heart or bones, to see if they are healthy.

There are also other gamma-emitting isotopes like Cobalt-60 and Cesium-137, which are used in cancer treatment to kill cancer cells. They can be very dangerous if they are not handled properly though, because they give off a lot of radiation that can make people sick.

Overall, gamma-emitting isotopes are very powerful tools that we use to help us see and treat things inside our bodies or even in outer space, but we have to be very careful with them to make sure they don't hurt us.