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7 ore fa · In 1809, the British chemist and inventor Humphry Davy made a groundbreaking discovery that reshaped the understanding of metals and nonmetals. When he isolated sodium and potassium , their low densities (floating on water!) contrasted with their metallic appearance, challenging the stereotype of metals as dense substances.
7 ore fa · 1808 on 30 June, Humphry Davy announced he had separated the element boron. ... He founded the Hungarian school of algebra. *Wik. 1954 David Ríos Insua ...
7 ore fa · 1802: Humphry Davy invents the arc lamp (exact date unclear; not practical as a light source until the invention of efficient electric generators). 1804: Friedrich Sertürner discovers morphine as the first active alkaloid extracted from the opium poppy plant. 1804: Joseph Marie Jacquard develops his automated Jacquard loom.
