Chemistry

Chemistry : Group 17 The halogens or halogen agents atomic number 18 a serial publication of nonmetal elements from Group 17 IUPAC Style ( haomaerly: VII, VIIA) of the periodic set back, comprising nuclear number 9 (F), chlorine (Cl), bromine (Br), iodine (I), and nuclear number 85 (At). The by artificial path created element 117, provision entirelyy referred to by the systematic name ununseptium, whitethorn 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 Greek melodic theme hal- (which look ons salt) and -gen (which means to form). Together these talk 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 alike applicable to real-life, whether it be the fluoride that goes in toothpaste, the chlorine that disinfects drinking urine, or the iodine that is responsible for the exertion of thyroid horm 1s in ones body. The stem of halogens is the nevertheless periodic table group which contains elements in all leash familiar states of subject field at standard temperature and pressure. Halogens are extremely reactive, and as such(prenominal) john be injurious or lethal to biological organisms in sufficient quantities.

This extravagantlyer(prenominal) responsiveness is due to the atoms being super electronegative due to their high effective nuclear charge. They contribute gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements in existence, attacking otherwise sloppy materials such as glass, and forming compounds with the heavier wondrous gases. It is a corrosive and passing toxic gas. The reactivity of farad is such that if used or stored in laboratory glassware, it crowd out react with glass in the presence of small amounts of pissing to form silicon tetrafluoride (SiF4). hence fluorine must be handled with substances such as polytetrafluoroethylene (which is itself an organofluorine compound), extremely...If you want to get a full essay, order it on our website: Orderessay

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