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It was discovered by Henry Cavendish
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It was discovered by Daniel Rutherford
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It was discovered by Joseph Priestly
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Known since anciet times - no name
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It was discovered by Nicholas-Louis Vauquelin
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It was discovered by Humphry Davy
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It was discovered by Johan August Arfvedson
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It was discovered by Pierre-Jules-Cesar Janssen
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It was discovered by Ferdinand Frederic
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It was discovered by Sir William Ramsay
