Zinc By: Bo Jun Kim G9 Amber
About Zinc • Zinc, in commerce also spelter, is a metallic chemical element; it has the symbol Zn and atomic number 30. It is the first element of group 12 of the periodic table. Zinc is, in some respects, chemically similar to magnesium, because its ion is of similar size and its only common oxidation state is +2. Zinc is the 24th most abundant element in the Earth's crust and has five stable isotopes.
Discovery • German scientist Andreas Margraf discovered the element in 1746. Even if Margraf was recognized for the discovery of the element, many historians agree that the element was already used by ancient people. One of the evidences that the element was used in early societies is the prehistoric statuette that was recovered in Transylvania, which was made from 87.5 per cent zinc.
Major Producers • Zinc is the fourth-most common metal in use with an annual production of about 12 million tones. The world consumption of zinc is around 10774000 tons. China, United States, and Japan are the largest consumers of zinc. Among this countries, China is the largest zinc producer in the world.
Physical Properties • The physical properties of zinc include a blueish-white lustrous material. The material is brittle at ambient temps but malleable at 100- 150 degrees Celsius. Zinc is a metal that has a hexagonal crystal structure, a melting point of 419.58 degrees celcius and a boiling point of 907 degrees celcius
Application • World-wide use of zinc oxide is in excess of 1.2 million tones annually. On a contained zinc basis the oxide accounts for about 9% of metallic zinc. Probably 60% of zinc oxide uses secondary zinc, primarily top dross from continuous galvanising, as the zinc source. China is by far the dominant supplier and also largest user, followed by the U.S.. Although rubber products and in particular tires are the major use for rubber, there are considerable variations around the world in use patterns.
Health Issues • Advantages: Zinc sulfate is a very effective method for treating zinc deficiency, causing a person's zinc level to rise significantly when taken as a supplement. Almost all fertilizers use zinc sulfate because of its positive benefit to plants. Both over-the-counter and prescription acne medicines contain zinc sulfate, as well as other skin care products, because of its ability to kill microorganisms on the skin. • Disadvantages: It's likely that most women get enough zinc in their diets. Therefore, Adding a zinc supplement to your diet, however, can be dangerous to your health, causing stomach upset, nausea, vomiting, headache and anemia.
Biblography • http://www.ask.com/question/physical-properties-of-zinc • http://www.mapsofworld.com/minerals/world-zinc-producers.html • http://ezinearticles.com/?The-Discovery-of-Zinc&id=4http://wiki.answers.com/Q/What_are_the_physical_property_of_zinc?#slide=1305623 • http://woman.thenest.com/zinc-benefits-disadvantages-2046.html