Top 10 Rarest Elements on Earth

Promethium: which is also on this list, most of the naturally occurring Promethium can be found in uraninite ore deposits.

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Protactinium: is highly radioactive and also has a high toxicity. While Protactinium is mostly extracted from spent nuclear fuel.

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Americium: is another rare completely synthetic element that is produced from nuclear reactions. The longest-lived and most common.

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Neptunium: is the first transuranic element, coming just after Uranium on the periodic table. Trace amounts of some Neptunium isotopes.

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Astatine: Astatine is the rarest naturally occurring element on Earth, with less than 1 gram present in Earth’s crust at any one time.

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Californium: most transuranium elements (elements with atomic numbers greater than 92, uranium) have no practical uses outside.

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Curium: is a transuranic radioactive chemical element that was named for Marie and Pierre Curie, who were known for their research.

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Francium: There are currently 34 known isotopes of Francium, ranging in atomic mass from 199 to 232. Only Francium-223.

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Berkelium: the Lawrence Berkeley National Laboratory (then the University of California Radiation Laboratory) is located.

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Oganesson: Oganesson is one of the rarest synthetic elements and only a few atoms have ever been produced.

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