Jöns Jacob Berzelius

Joseph Proust and the Law of Constant Composition

Joseph Proust and the Law of Constant Composition

On September 26, 1754, French chemist Joseph Louis Proust was born. He was best known for his discovery of the law of constant composition in 1799, stating that in chemical reactions matter is neither created nor destroyed. A Young Chemist Joseph L. Proust was born on September 26, 1754 in Angers, France as the second son of Joseph Proust, an apothecary, and Rosalie Sartre. Joseph studied chemistry in his father’s shop and later came to…
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Jöns Jacob Berzelius – One of the Founders of Modern Chemistry

Jöns Jacob Berzelius – One of the Founders of Modern Chemistry

On August 20, 1779, Swedish chemist Jöns Jacob Berzelius was born. Berzelius is considered, along with Robert Boyle, John Dalton, and Antoine Lavoisier, to be one of the founders of modern chemistry. In Sweden, Berzelius Day is celebrated on 20 August in honor of him. “Every chemical combination is wholly and solely dependent on two opposing forces, positive and negative electricity, and every chemical compound must be composed of two parts combined by…
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Martin Heinrich Klaproth and the Analytical Chemistry

Martin Heinrich Klaproth and the Analytical Chemistry

On December 1, 1743, German chemist Martin Heinrich Klaproth was born. Klaproth became well known a founder of analytical chemistry discovered uranium (1789), zirconium (1789), cerium (1803), and contributed to the identification of others. Although he did not isolate them as pure metal samples, he was able to recognize them as new elements. Youth and Education Martin Heinrich Klaproth was born in Wernigerode as the child of a poor tailor. After attending…
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