What is Caesium-137?
'''Caesium 137''' is an [[isotope]] of [[caesium]]. It is [[radioactive decay|radioactive]]. It is often a by-product of [[nuclear energy|nuclear]] [[fission]]. It has a [[Half-life (element)|half life]] of about 30 years. Many areas where nuclear accidents have occurred, such as Chernobyl and Fukushima, are contaminated with caesium-137. [[Category:Isotopes]] {{chem-stub}}