what is a covalent bond?
a bond between atoms formed when atoms SHARE electrons to achieve a full outer shell of electrons
explain the melting and boiling points of covalent bonds
HIGH melting and boiling points because a large amount of energy is needed to overcome the strong covalent bonds
conductivity of covalent bonds
most covalent structures do not allow for free moving charged particles so most have no charge (an exception of this is graphite)