Arsenic

1/5/12 Chemistry ratsbane The enunciate white arsenic trioxide is borrowed from the Persian word Zarnikh meaning yellow orpiment. Zarnikh was borrowed by Grecian as arsenikon. During the tan Age, arsenic was often included in the bronze (mostly as an impurity), which made the alloy harder. In the 700s, an Arab alchemist named Jabir became the low gear to prepare arsenic trioxide, a white, tasteless, odorless powder. arsenous oxide became a favorite implementation weapon of the middle Ages, particularly among ruling classes in Italy. Albertus Magnus is believed to assume been the first to isolate the element in 1250. In 1649 Johann Schroeder promulgated two ways of preparing arsenic. Arsenic (As) has the atomic takings 33. It has an atomic mass of 74.9216 g.mol -1 and a density of 5.7 g.cm-3 at 14°C. Arsenic has a melting point of 814 °C and a stewing point of 615 °C. It also has 8 isotopes. Arsenic appears in 3 forms: Yellow, Black and Grey. Grey is the stable form and is a breakable crystalline solid. It tarnishes rapidly in air, and at higher(prenominal) temperatures ruin forming a white cloud of arsenic trioxide. During the 18th, 19th, and twentieth centuries, a number of arsenic compounds have been used as medicines.

Arsenic compounds are used in making especial(a) types of glass, as a wood preservative and, lately, in the semiconductor unit gallium arsenade, which has the ability to convert electric current to laser light. Arsine foul up AsH3, has become an important doping gas in the microchip industry, although it requires hard-and-fast guidelines regarding its use because it is ext remely toxic. Arsenic has been called the a! cerbate of Kings and the King of Poisons and is nonpareil of the most toxic elements that can be found. Exposure to inorganic arsenic can cause divers(a) health effects, such(prenominal) as irritation of the stomach and intestines, decreased action of rosy-cheeked and white blood cells, skin changes and lung irritation. It is suggested that the uptake of noteworthy amounts of inorganic arsenic can intensify the chances of cancer...If you want to convey a full essay, order it on our website: BestEssayCheap.com

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