Resultado de búsqueda
Hace 3 días · 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.
- Opal
Opal is fundamentally colourless, but such material is...
- Zeolites
zeolite, any member of a family of hydrated aluminosilicate...
- Chalcedony
Chalcedony, a very fine-grained (cryptocrystalline) variety...
- Agate
Agate, common semiprecious silica mineral, a variety of...
- Amphibole
The fundamental building block of all silicate mineral...
- Silicon-30
Other articles where silicon-30 is discussed: silicon:...
- Opal
Hace 1 día · 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.
- crystalline, reflective with bluish-tinged faces
- see Allotropes of silicon
6 de may. de 2024 · Pocos años después, el químico sueco Jöns Jacob Berzelius hizo otro avance al explicar la unión entre un átomo y otro por medio de fuerzas eléctricas. Él logró mostrar que hay átomos muy positivos y otros muy negativos y que los unos tienden a unirse con los otros, siendo el más negativo de todos el oxígeno, que se une ...
10 de may. de 2024 · 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.
Hace 2 días · 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.
- grey metallic-looking, red, and vitreous black (not pictured) allotropes
- group 16 (chalcogens)
- 34
9 de may. 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 ...
6 de may. de 2024 · thorium (Th), radioactive chemical element of the actinoid series of the periodic table, atomic number 90; it is a useful nuclear reactor fuel. Thorium was discovered (1828) by Swedish chemist Jöns Jacob Berzelius. It is silvery white but turns gray or black on exposure to air.
