^Natural Uranium

^Natural Uranium

Found as uranium oxide (U2 O3)  which when purified has a rich yellow color and is called “yellowcake”. Uranium has three isotopes namely:

92U238 (99.3%), 92U235 (0.69%) & 92U234 (0.01%).

As the relative of abundance is highest for 92U238, it is called FERTILE. However fission is possible only with 92U235, thus is called FISSILE.

Chemical isotopes that can sustain a fission chain reaction are called nuclear fuels, and are said to be fissile.

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