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Aluminium (or aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air.
The assertion that "Aluminium is the element, Aluminum is the alloy" contradicts established scientific consensus. According to the IUPAC (International Union of Pure and Applied Chemistry), the correct term for the element with atomic number 13 is "Aluminium". In American English, the term "Aluminum" refers to the same element, not an alloy.
Alum in the form of potassium aluminium sulphate or ammonium aluminium sulfate in a concentrated bath of hot water is regularly used by jewelers and machinists to dissolve hardened steel drill bits that have broken off in items made of aluminum, copper, brass, gold (any karat), silver (both sterling and fine) and stainless steel. This is ...
The introduction of these methods for the mass production of aluminium led to extensive use of the light, corrosion-resistant metal in industry and everyday life. Aluminium began to be used in engineering and construction. In World Wars I and II, aluminium was a crucial strategic resource for aviation.
The Spanish language is one of many major languages with limited use in science and technology. The main cause of this is the proliferation of English in scientific writing, which has been ongoing since English displaced French and German as the languages of science in the first half of the 20th century. [9]
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Aluminum reticular domes allow for large dimensions and short building times, suitable for sports arenas, exhibition centers, auditoriums, or storage facilities. The Dome of Discovery exhibition hall was built in London in 1951. [115] It was the largest domed building in the world at the time, 365 feet wide.
A gay Georgia couple convicted of sickening sexually abuse of their two adopted sons will spend the rest of the lives behind bars.. William and Zachary Zulock, 34 and 36, were each sentenced last ...