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Africa Electricity for sand and gravel production line

Silicon is a chemical element with the symbol Si and atomic number 14 It is a hard brittle crystalline solid with a bluegrey metallic lustre and is a tetravalent metalloid and semiconductorIt is a member of group 14 in the periodic table carbon is above it and germanium tin lead and flerovium are below it It is relatively unreactive Because of its high chemical affinity for oxygen

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