Carl Wilhelm Scheele (9 December 1742 – 21 May 1786) was a German-Swedish pharmaceutical chemist. Isaac Asimov called him "hard-luck Scheele" because he made a number of chemical discoveries before others who are generally given the credit. For example, Scheele discovered oxygen (although Joseph Priestley published his findings first), and identified molybdenum, tungsten, barium, hydrogen, and chlorine before Humphry Davy, among others.
Read more about Carl Wilhelm Scheele: Biography, Existing Theories Before Scheele, Disproving The Theory of Phlogiston, New Elements and Compounds, Death
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