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Which metals in the actinide series are found on the Earth's crust?

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Thorium and uranium are the only actinides found in the earth's crust in appreciable quantities, although small amounts of neptunium and plutonium have been found in uranium ores.

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Similar questions: Which of the actinides are most likely to be found on the surface? Which of the actinides are in the Earth's crust? Which of the metals in the actinide series could most likely be found? [ Hide these questions ]

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