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
These processes can be reversed so that the atoms are back to their neutral ground state. The number of protons is unique to the element. So a carbon with a missing proton isn't carbon, it is a boron with an extra electron. Yes, the number of protons and electrons are equal in the atoms of every element. This is essential to maintain electric neutrality of the atoms. However, this rule doesn't apply to ions. Also, the number of protons or electrons is called the atomic number and is useful to place the elements in the periodic table.