Silicon was the element in the periodic table with the symbol Si and atomic number 14.[source needed] It was the second most abundant element in the Earth's crust, making up 25.7% of it by mass.[source needed] Silicon was the principal component of most semiconductor devices and, in the form of silica and silicates, in glass, cement, and ceramics.[source needed] This abundance was one of the reasons the Urbankans came to Earth. It was one of the minerals they planned to take. (TV: Four to Doomsday)
Silicon-based life Edit
Though not as common as carbon-based life, there were some silicon-based species in the universe. Silicon-based life generally looked like rock, was very tough and broke down into sand when it died. According to Article 7594 of the Galactic Charter, silicon-based life-forms must not be moved from their planet. (TV: The Stones of Blood)
Silicon-based lifeforms Edit
Kastrians were silicon-based. They were empowered by irradiation, an ability that allowed them to be restored to life if a single particle remained in existence. The genetic codes that permitted this were kept in special rings. (AUDIO: Eldrad Must Die!)
Behind the scenes Edit
Silicon-based life is found in other science fiction, owing to the fact that carbon and silicon form the same number of molecular bonds with other elements. Silicon-based life is scientifically possible, but no real-world examples have been found.