Chemistry

Chemistry : Group 17 The halogens or halogen agents ar a series of nonmetal elements from Group 17 IUPAC Style ( sourcely: VII, VIIA) of the occasional table, comprising atomic number 9 (F), chlorine (Cl), bromine (Br), unity (I), and atomic number 85 (At). The artificially created element 117, provisionally referred to by the systematic name ununseptium, may excessively be a halogen. *Chlorine (Cl2) was the first halogen to be observed in 1774, followed by iodine (I2), bromine (Br2), atomic number 9 (F2), and astatine (At), which was discovered last in 1940. The name halogen is derived from the classic root hal- (which means salt) and -gen (which means to form). unitedly these spoken communication combine to mean salt former, which is in recognition to the fact that halogens form salts when they react with metals. Lastly, the halogens are also applicable to real-life, whether it be the fluoride that goes in toothpaste, the chlorine that disinfects drinkable u rine, or the iodine that is responsible for the production of thyroid hormones in ones body. The group of halogens is the nevertheless periodic table group which contains elements in all leash familiar states of matter at regular temperature and pressure. Halogens are extremely labile, and as such john be harmful or lethal to biological organisms in satisfactory quantities. This higher(prenominal) responsiveness is cod to the atoms being highly negatronegative due to their high effective nuclear charge. They can gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements in existence, attacking otherwise inert materials such as glass, and forming compounds with the heavier terrific gases. It is a corrosive and highly toxic gas. The reactivity of fluorine is such that if used or stored in research laboratory glassware, it can react with glass in the presence of smooth amounts of water to form silicon tetrafluoride (SiF4). Th us fluorine must be handled with substances! such as Teflon (which is itself an organofluorine compound), extremely...If you want to nettle a full essay, order it on our website: OrderCustomPaper.com

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