Question

Joseph Priestley
1733-1804 (British)
Discovered oxygen​

Answer 1

An English chemist, Joseph Priestley, independently discovered oxygen in 1774 by the thermal decomposition of mercuric oxide and published his findings the same year, three years before Scheele published.

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Answer 2

Answer:

Joseph Priestley was first discovered oxygen.In 1774 he prepared oxygen by heating mercury oxide with a burning glass .He found that oxygen did not dissolve in water and it made combustion stronger

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