Uranium
Uranium has the atomic number of 92, its chemical letter is U. It is one of the most dense metals on earth. Uranium is mainly known for being used in nuclear weapons. Nowdays uranium is mainly used in Nuclear power plants. It was discovered in 1789 by Martin Klaproth, a German chemist. It has a melting point of 1132 celcius, and was apparently formed in a supernova. This is not unccomon. Uranium is the main source of heat in the earths core.
Uranium is being mined in several countries, but can only be sold to countries that have signed a treaty saying that they won't use it for nuclear weapons. However, uranium is still used in more appliances then you might think, because of its many strange properties.
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