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How did they find argon?

Updated: 8/18/2019
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13y ago

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The existence of Argon was suspected by Henry Cavendish but it was not until more than a hundred years later that it was isolated. Lord Rayleigh and Sir William Ramsay conducted an experiment in which they removed all the oxygen, carbon dioxide, water and nitrogen from a sample of clean air.

They found that nitrogen obtained in this manner was 0.5% heavier than that obtained from other compounds. They concluded that that there was some other gas mixed in with the nitrogen. It was Argon.

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8y ago
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Q: How did they find argon?
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