atomic number 30 is a chemical element with the symbol Zn. It is numbered 30 on the periodic table and is a bluish-white metallic element. Zinc exists naturally in air, water and soil. It is present e very(prenominal)where in the environment and all life on earth has evolved in the presence of zinc. (Encyclopaedia Britannica 2010) (pg970 971) Natural processes such as erosion, forest fires and volcanic eruptions continuously transport Zinc around the Earth. Zinc is a low- black marketing metal that belongs to the Group II b of the periodic table. The atomic number of zinc is 30. With an atomic weight of 65.39g/mol, zinc makes up an average of 65 grams of every tonne of Earths crust. The melting bit of zinc is 420 degrees Celsius and its boiling point is 907 degrees Celsius. Zinc is the second most common trace metal, after iron that is found naturally in the human body.( McGraw-Hill encyclopaedia of science and technology tenth edition 2007)(pg. 749-750)
History
In around 200BC the Romans produced brass, which is an alloy made from fuse Zinc and Copper, in crucibles. A crucible as imagine bellow (Fig 1.1) is a container made from clay which could withstand very high temperatures.
The mixture used in the crucible to occasion Brass was Zinc oxide and charcoal, covered in lumps of solid Copper. Zinc vapour was created in the top section (lid) of the crucible when heat and mixed with the Copper to form Brass. The temperature was then increased which would melt the Brass to then form into ingots. The realisation that in coiffure to make Zinc, you must...If you want to get a full essay, crop it on our website: Orderessay
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