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Manganese is: Manganese is a chemical element, designated by the symbol Mn. Manganese is a silvery-gray metal resembling iron. It is hard and very.

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Presentation on theme: "Manganese is: Manganese is a chemical element, designated by the symbol Mn. Manganese is a silvery-gray metal resembling iron. It is hard and very."— Presentation transcript:

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5 Manganese is: Manganese is a chemical element, designated by the symbol Mn. Manganese is a silvery-gray metal resembling iron. It is hard and very brittle, difficult to fuse, but easy to oxidize. [1] Manganese metal and its common ions are paramagnetic.chemical elementmetal [1]paramagnetic Manganese makes up about 1000 ppm (0.1%) of the Earth's crust, making it the 12th most abundant element there. [ppm Earth's crust [ 18] Soil contains 7–9000 ppm of manganese with an average of 440 ppm. [18] 18] [18] Seawater has only 10 ppm manganese and the atmosphere contains 0.01 µg/m 3. [18]ppm [18]

6 Phosphates are:

7 cCoal Mining is: The goal of coal mining is to economically remove coal from the ground.coal Coal was mined from underground. Coal was mined from underground with a pick and shovel. Methods of extraction 1. Modern surface mining 2. Area mining 3.Contour mining 4.Mountaintop removal mining 5.Room and pillar mining 6.Underground mining a. Long wall mining b. Continuous miningLong wall miningContinuous mining c. Blast mining Blast mining d. Shortwall miningShortwall mining e. Retreat miningRetreat mining

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17 table31.html table31.html d.html d.html ganese.asp ganese.asp 005.htm 005.htm

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