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Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure element in the Earth's crust. It is most widely distributed in dusts, sands, planetoids, and planets as various forms of silicon dioxide (silica) or silicates.
silicon (Si) (silÂ´ikon) , n a nonmetallic element, second to oxygen as the most abundant of the elements. Its atomic number is 14, and its atomic weight is 28. It occurs in nature as silicon dioxide and in silicates.The silicates are used as detergents, corrosion inhibitors, adhesives, and sealants. a nonmetallic element, second to oxygen as the most abundant of the elements. Its atomic number is 14, and its atomic weight is 28. It occurs in nature as silicon dioxide and in silicates. The silicates are used as detergents, corrosion inhibitors, adhesives, and sealants.