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
That symmetry cancels out the polarity of the bonds and carbon tetrachloride has nonpolar molecules. Regarding the polarity of this molecule, it is true that each carbon-to-chlorine bond is a polar bond in which the electrons are going to be pulled away from the carbon toward the chlorine.This is because chlorine is more electronegative. However, the molecule is symmetric. has no unbonded electron pairs. tetrahedral. Regarding the polarity of this molecule, it is true that each carbon-to-chlorine bond is a polar bond in which the electrons are going to be pulled away from the carbon toward the chlorine. This is because chlorine is more electronegative.