Silicon element symbol Si
Silicon
Atomic number 14
Relative atomic mass 28.09
There are two kinds of allotropes, amorphous and crystalline.
silicon
silicon
Crystalline silicon is steel gray, amorphous silicon is black, density 2.4g/cm3, melting point 1420°C, boiling point 2355°C, crystalline silicon is an atomic crystal, hard and shiny, with 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. It is used to make alloys such as ferrosilicon, silicon steel, etc., single crystals Silicon is an important semiconductor material used to make high-power transistors, rectifiers, solar cells, etc. Silicon is widely distributed in nature, about 27.6% in the earth's crust, mainly in the form of silica and silicate.
