SSC Chemistry notes 10th Chapter Mineral Resources: Metal-Nonmetal. Bijoypur, Gopalpur of Durgapur Upazilla of Netrokona district of Bangladesh is one of the best tourism places of Bangladesh. Hill of white clay is seen here beside the attractive lake. This clay rich in Kaolin or aluminum is used in ceramic industries. In the beginning, the people of China used this type of clay that is why this clay is called china clay. Generally, black or gray and radish clay is seen. In every case the characteristics of clays are different. The cause of these varieties is the presence of different minerals in clay.
SSC Chemistry notes 10th Chapter Mineral Resources: Metal-Nonmetal
Write the name of sodium and calcium compounds which are found in nature. Sand (quartz; silicon dioxide, SiO2), Table salt (sodium chloride, NaCl), limestone (calcium carbonate, CaCO3). Compounds of reactive metals are found in abundance in nature. On the other hand compounds of less reactive metal is found in the small amount. As a result of the less reactive metals such as- silver (Ag), copper (Cu), zinc (Zn), tin (Sn) and lead (Pb), etc. are valuable. Although nonreactive metal gold (Au) is found free in nature it is almost rare. This is why gold is precious. The three-fourths of the 98 elements found in nature are metals. Metals have some excellent characteristics. That is why the use of metal is so wide.
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