kísíl
Kísíl is a chemical element with the symbol Si and atomic number 14. It is a metalloid, meaning it has properties of both metals and nonmetals. In its pure form, kísíl is a hard, brittle, crystalline solid with a blue-gray metallic luster. It is the eighth most abundant element in the Earth's crust, making up about 27.7% by mass. Kísíl is not found in its elemental form in nature; instead, it is most commonly found as silicon dioxide (SiO2), also known as silica, which is the main component of sand and quartz, or as silicates, which are compounds containing silicon and oxygen along with other elements.
The discovery of kísíl is credited to the Swedish chemist Jöns Jacob Berzelius in 1823, although it