3/15/2023 0 Comments Silicon atomic number![]() He changed the element’s ending to on because the element was more similar to nonmetals boron and carbon than it was to metals such as calcium and magnesium. ![]() He retained part of Berzelius’s name, from ‘silicis,’ meaning flint. Silicon was given its name in 1831 by Scottish chemist Thomas Thomson. ![]() (5) The problem was that the new element was a better conductor of electricity than nonmetals, but not as good a conductor as a metal. Unaware that such materials existed and that silicon was an excellent example of a semiconductor, scientists debated whether the new element should be classed as a metal or a nonmetal.īerzelius believed it was a metal, while Humphry Davy thought it was a nonmetal. (3), (4)Īt that time the concept of semiconductors lay a century in the future. In 1824, Swedish chemist Jacob Berzelius produced a sample of amorphous silicon, a brown solid, by reacting potassium fluorosilicate with potassium and purifying the product with repeated washing. They did not, however, attempt to purify this new substance. Gay-Lussac and Louis Jacques Thénard may also have made impure silicon by reacting potassium with silicon tetrafluoride to produce a reddish brown solid which was probably amorphous silicon. It is possible that in England, in 1808, Humphry Davy isolated partly pure silicon for the first time, but he did not realize it. Silicon accounts for 28% of the weight of Earth’s crust. This new element, he said, must be very abundant. In 1789, the French chemist Antoine Lavoisier proposed that a new chemical element could be found in quartz. Flint is a form of quartz, and tools made from flint were in everyday use in the stone age. Quartz (crystalline silicon dioxide) has been known to people for many thousands of years.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |