Silicon
Today's focuses on a very common non-metallic element - silicon. It is a carbon group element in the third period of the periodic table.In 1811, French chemists first obtained impure amorphous silicon by heating potassium and silicon tetrafluoride, which can be obtained in a variety of ways. In the crust, it is the second most abundant element, which makes up 26.4 percent of the total mass of the crust, is second only to oxygen.