Cesium is a soft, silvery white-gray metal that occurs in nature as cesium-133. Cesium 133 is an isotope of cesium used especially in atomic clocks and one of whose atomic transitions is used as a scientific time standard and exists as a naturally stable isotope. It has 9,192,631,770 electron cycles per second and isn’t considered radioactive. This is a stable fission product produced from power plants; even though radiation is not a problem from Cesium 133, there are many other isotopes that emit radiation that is harmful to humans and nature. It’s natural so it can be found in nature and is not harmful in low doses! Cesium can even be taken into the body by eating food, drinking water, or breathing air. After being taken in, cesium behaves in a manner similar to potassium and distributes uniformly throughout the body. Radioactivity is found in nature and comes from many elements. Every day, we ingest and inhale radioactive elements in our air and food and the water. Natural radioactivity is common in the rocks and soil that makes up our planet, in water and oceans, and in our building materials and homes. There is nowhere on Earth that you can not find Natural Radioactivity.