Resultado da Busca
Há 6 dias · A Swedish chemist and disciple of Dalton, Jöns Jacob Berzelius embarked on a systematic program to try to make accurate and precise quantitative measurements and to ensure the purity of chemicals. Along with Lavoisier, Boyle, and Dalton, Berzelius is known as the father of modern chemistry.
22 de mai. de 2024 · No final do século XVIII e início do século XIX acreditava-se na teoria da força vital formulada por Jöns Jacob Berzelius, que dizia que os compostos orgânicos só poderiam ser produzidos por organismos vivos (animais e vegetais).
14 de mai. de 2024 · Amorphous elemental silicon was first isolated and described as an element in 1824 by Jöns Jacob Berzelius, a Swedish chemist. Impure silicon had already been obtained in 1811. Crystalline elemental silicon was not prepared until 1854, when it was obtained as a product of electrolysis.
- The Editors of Encyclopaedia Britannica
9 de mai. de 2024 · Jöns Jacob Berzelius, often cited as the father of organic chemistry at the beginning of the 19th century, pleaded the cause of vitalism for the major part of his scientific life, and continued to do so even after Friedrich Wöhler, one of his former students, had shown in 1828 that the organic molecule urea could be synthesized ...
Há 3 dias · Jöns Jacob Berzelius discovered the silicon element in 1823. In 1787, Antoine Lavoisier suspected that silica might be an oxide of a fundamental chemical element, but the chemical affinity of silicon for oxygen is high enough that he had no means to reduce the oxide and isolate the element.
Há 2 dias · Selenium (from Ancient Greek σελήνη (selḗnē) 'moon') was discovered in 1817 by Jöns Jacob Berzelius, who noted the similarity of the new element to the previously discovered tellurium (named for the Earth). Selenium is found in metal sulfide ores, where it partially replaces the sulfur.
30 de mai. de 2024 · From its discovery in 1803 by Jöns Jakob Berzelius and Wilhelm Hisinger to its modern-day uses in catalytic converters, glass polishing, and even as a crucial component in lighter flints, cerium has left an indelible mark on various industries and scientific endeavors.
