Answer:Oxygen
Explanation:
Discovery of Oxygen
On August 1, 1774, Priestley conducted his most famous experiment. Using a 12-inch- wide glass lens, he focused sunlight on a lump of mercuric oxide in an inverted glass container placed in a pool of mercury.
Answer:
Joseph Priestley and the Discovery of Oxygen
Explanation:
On August 1, 1774, he conducted his most famous experiment. Using a 12-inch-wide glass "burning lens," he focused sunlight on a lump of reddish mercuric oxide in an inverted glass container placed in a pool of mercury.
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