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Zinc is a chemical element with symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table.In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state +2, and the Zn 2+ and Mg 2+ ions are of similar size. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes.
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Copper is a chemical element with symbol Cu from Latin: cuprum and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.A freshly exposed surface of pure copper has a pinkishorange color.Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling
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Oct 03, 2012· The DRC's formal economy is dominated by the mining sector. Minerals account for the vast majority of exports and represent the single largest source for foreign direct investment FDI.
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MSC, ==> Main Ship EquipmentsEquipment TypesMain Marine Manufacturers Ship Spare Parts, =1=A=B=C=D=E=F=G=H=I=J=K=L=M=N=O=P=Q=R=S=T=U=V=W=X=Y=Z= , by H. NakajimaParts 1Parts 2Parts
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