Silicon is a member of Group 14 (IVA) in the periodic table. The periodic table is a chart that shows how chemical elements are related to one another. Silicon is also part of the the carbon family. Other carbon family elements include carbon, germanium, tin, and lead. Silicon is a metalloid, one of only a very few elements that have characteristics of both metals and non-metals. Silicon is the second most abundant element in the Earth's crust, exceeded only by oxygen. Many rocks and minerals contain silicon.
circumscribe meaning, definition, what is circumscribe: to limit something: . Learn more.
Definition of credence. 1a : mental acceptance as true or real give credence to gossipb : credibility 1 lends credence to the theory an idea that is gaining credence. 2 : credentials âused in the phrase letters of credence. 3 [Medieval French, from Old Italian credenza] : a Renaissance sideboard used chiefly for valuable plate.