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John Davy FRS FRSE (24 May 1790 – 24 January 1868) was a Cornish doctor, amateur chemist, brother of the noted chemist Sir Humphry Davy, and cousin of Edmund Davy.. During his career, Davy discovered phosgene, silicon tetrafluoride, and concluded that chlorine was an element.
41 of the 118 known elements have names associated with, or specifically named for, places around the world or among astronomical objects. 32 of these have names tied to the places on Earth, and the other nine are named after to Solar System objects: helium for the Sun; tellurium for the Earth; selenium for the Moon; mercury (indirectly), uranium, neptunium and plutonium after their respective ...
In 1810, chlorine was given its current name by Humphry Davy (derived from the Greek word for green), who insisted that chlorine was in fact an element. [72] He also showed that oxygen could not be obtained from the substance known as oxymuriatic acid (HCl solution).
Chlorine is the second halogen, being a nonmetal in group 17 of the periodic table. Its properties are thus similar to fluorine, bromine, and iodine, and are largely intermediate between those of the first two. Chlorine has the electron configuration [Ne]3s 2 3p 5, with the seven electrons in the third and outermost shell acting as its valence ...
Aqua regia first appeared in the De inventione veritatis ("On the Discovery of Truth") by pseudo-Geber (after c. 1300), who produced it by adding sal ammoniac (ammonium chloride) to nitric acid. [ 6 ] [ d ] The preparation of aqua regia by directly mixing hydrochloric acid with nitric acid only became possible after the discovery in the late ...
Carl Wilhelm Scheele (German:, Swedish: [ˈɧêːlɛ]; 9 December 1742 – 21 May 1786 [2]) was a German Swedish [3] pharmaceutical chemist.. Scheele discovered oxygen (although Joseph Priestley published his findings first), and identified molybdenum, tungsten, barium, nitrogen, and chlorine, among others.
A 1960s, Spanish-language commercial for Cloralex, a popular chlorine solution in Mexico, has gone viral on TikTok for its disturbing recommendations. In the black-and-white clip, a woman, dressed ...
Jesus [d] (c. 6 to 4 BC – AD 30 or 33), also referred to as Jesus Christ, [e] Jesus of Nazareth, and many other names and titles, was a first-century Jewish preacher and religious leader. [10] He is the central figure of Christianity , the world's largest religion .