Elements

1(a).The five most abundant divisors in Earths crust be atomic number 8, Silicon, Aluminium, straighten out and atomic number 20: (b) 1. 2. 3. 4. 5. lancinate material adjure ore Oxygen46.1% non alloy Silicon28.2% tackle metal Aluminum8.23% metal compact5.63% metal Calcium4.15% metal http://education.jlab.org/burnish/abund_ele.html 2. The elements in the centre of the periodic table, mingled with groups 2 and 3, be called the transition metals. Most of the commonly use metals ar there, including press, copper, property and gold. The raw materials for extracting cast- fight and their function in the surgery Contains campaign oxide Function a compound that contains contract Iron is classify as a transition element because it is both elastic and ductile, and it can conduct heat and electricity. Iron, cobalt and nickel atomic number 18 the only elements in the transition metals family cognise to produce a magnetic f ield. 1. 2. 3. 4. They are normally mellowed melting heighten metals. They have several oxidation states. They usually form obscure compounds. They are often paramagnetic. http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel_pre_2011/patterns/transitionmetalsrev1.shtm 3(a). Iron is extracted from iron ore in a huge container called a honk furnace.

Iron ores such as haematite contain iron oxide. The type O must be removed from the iron oxide to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions. The process of the extraction of iron is carried out by the following travel: Concent ration of ore Calcination or Roasting o! f ore decrease of ore Concentration of ore: In this metallurgical operation, the ore is concentrated by removing impurities alike(p) soil and so on The process involves the crushing and backwash of ore. Calcination or Roasting of ore: The concentrated ore is now heated in the presence of air. The process of cook is performed to remove moisture, CO 2 , impurities of sulphur, arsenic. Ferrous oxide is also oxidise to...If you want to get a full essay, order it on our website: BestEssayCheap.com

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