Answer: Antoine Lavoisier
Notes: In 1778, Antoine Lavoisier, considered "The father of modern chemistry", recognized and named oxygen, and recognized its importance and role in combustion. Antoine Lavoisier discovered the relationship between oxygen and metal that leads to rust. He also proved the role of oxygen in respiration and discovered the chemical composition of water and air. Henry Cavendish discovered hydrogen in 1766 as a colorless, odorless gas that burns and can form an explosive mixture with air.
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