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Silicon is an element that belongs to the group of semimetals. It was described by the French chemist and physicist Antoine Lavoisier in the 18th century, and pure silicon from silica was obtained in 1824 by Jöns Jacob Berzelius, a Swedish chemist and mineralogist. Silicon, after oxygen, is the most common element in nature. Its rich resources can be found in water, the lithosphere, and the soil, among others. It belongs to the group of trace elements. It occurs in the body in small amounts, and its amount decreases with age.
Boron was isolated simultaneously in 1808 by three chemists: Humphry Davy (by electrolysis of boric acid), Joseph Louis Gay-Lussac, and Louis Jacques Thénard (by reacting potassium with boron oxide). It occurs naturally in fresh vegetables and fruits, and especially in nuts.
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