Americium-243

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Americium-243 is a radioactive isotope os Americium having 95 electrons and protons and 148 neutrons. It has a half-life of 7370 years and it is highly unstable which is the reason why it is not found in nature. It either decays by Spontaneous fission or by emmiting an alpha particle (the decay energy is 5.44MeV and the decay product is Neptunium-239. This Isotope of Americium has a mass of 243.06138grams/mole.