Something about silicon
Silicon is a chemical element, the English name Silicon, the chemical symbol is Si, the old name is silicon, the atomic number is 14, the relative atomic mass is 28.0855, the density is 2.4g/cm³, the melting point is 1414°C, the boiling point is 2355°C, and it belongs to the IVA group on the periodic table.metal element.Silicon has two allotropes, crystalline silicon and amorphous silicon. Crystalline silicon is steel gray and amorphous silicon is black. Crystalline silicon is an atomic crystal, hard and shiny, and has semiconductor properties.The chemical properties of silicon are relatively active. It can combine with oxygen and other elements at high temperatures. It is insoluble in water, nitric acid and hydrochloric acid, but soluble in hydrofluoric acid and lye.Silicon is widely distributed in nature, and generally rarely occurs in the form of simple substances, mainly in the form of silicon dioxide and silicate. The crust contains about 27.6%, which is the second most abundant element in the crust after oxygen.Mainly used to make high-purity semiconductors, high temperature resistant materials, optical fiber communication materials, organic silicon compounds, alloys, etc., are widely used in aerospace, electronic and electrical, construction, transportation, energy, chemical, textile, food, light industry, medical, Agriculture and other industries.