The Prefix is Otterbox's least expensive iPhone case. The durable silicone, polycarbonate skeleton build of the OtterBox Prefix is thicker than the Commuter and Reflex, but also the least protective. The Prefix is a one-piece case, meaning that it does not snap in place like the Reflex .
carbon is considered tetravalent because it has four valence electrons the valence electrons are in the outermost shell of the atom and allows carbon to form four bonds to other atoms
Carbon tetrachloride Carbon tetrachlooride (CCl4), also called tetrachloromethane, is a simple organic halogen compound. Carbonate The acid that causes the tart taste of carbonated beverages. Carbonate ion Carbonates are widely used, dependent on the cation, as pharamceuticals, detergent, and pesticides.