Cadmium :: essays research papers fc

compact disk, symbol, Cd, is a silverywhite metallic element(prenominal) chemical element with a faint bluetinge to it. It is the fifty-seventh just about commonlyfound element in the earth. It was discovered byF. Stromeyer, in 1817, in Germany. Stromeyerwas studying a sample of coat carbonate which obscure into a the new element ultimately called compact disk. The only cadmium materials, greenockite (cadmium sulfide) and otavile(cadmium carbonate) are found in zinc oxide andzinc carbonate. Cadmium, which is usuallyassociated with zinc has some differences some ofwhich are that cadmium is softer and has a lower run and boiling point than zinc. There are fivebasic states of cadmium. First, thither is the regularraw metal cadmium. Then there is cadmium oxidewhich is organize by burning the raw metal in the airproducing brownness smoke. Cadmium oxide can alsobe formed by change cadmium carbonate in acidor ammonia producing a brown powder. By doingthis, cadmium and oxygen are be ing mixed.Cadmium carbonate is made by absorbing carbondioxide into the raw metal or mixing cadmium saltswith ammonium carbonate, forming a salt-likesubstance. Cadmium sulfide is made by mixinghydrogen sulfide with a beginning of cadmium ions,resulting in a range of colors from lemon sensationalistic toa deep red. Cadmium halides are compounds withcomplex cadmium ions in them to form variedstructure solutions. The regular structure of acadmium atom is that it has four electron shellswith a total of 48 electrons in it. The main use forcadmium is to plate iron, steel and other metals, defend them from corrosion. This method hasbeen used since 1919. The use of cadmium has tobe limited because it gives make large numbers oftoxins into the environment. The use of cadmiumhas gradually decreased in order to help theenvironment. It is not used to plate food impact parts or ovens because of this.Cadmium may be found in some cereals, nuts andvegetables, but scientists doubt that, if taken issmall quantities, it would lay down harmful. Cadmiumis also used for nickel-cadmium batteries andnuclear control rods. It is used in compounds, forexample, with copper to harden them. Since thecolor of cadmium sulfide varies it is useful for