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Events on Thursday 8 May 1794 1
1743 – 1794Antoine Lavoisier (1743-1794)Died 8 May 1794, aged 50French chemist regarded as the father of modern chemistry, known for identifying oxygen's role in combustion and helping establish the law of conservation of mass. He also served as a tax collector for the royal government, which made him a target during the Revolution. He was guillotined despite appeals citing his scientific contributions.