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Jöns Jakob Berzelius Baron

Berzelius, Jöns Jakob, Baron (1779–1848), Swedish chemist who determined the atomic weights of nearly 40 elements before 1818, discovered cerium (1803), selenium (1818), and thorium (1829), introduced the terms protein, isomerism, and catalysis, and devised the modern method of writing chemical formulas (1813).

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