# Question #89bab

May 19, 2017

Traditionally, we regard $\text{covalent bonding}$ as the sharing of electrons BETWEEN nuclei........
And so for TWO hydrogen atoms, two $\dot{H}$ radicals, the electrons couple to form a covalent bond; conceived to be a region of HIGH electron density between 2 adjacent nuclei such that electrostatic repulsion between the positively charged nuclei is NEGATED, and a net attractive force results.
On the other hand, $\text{ionic bonding}$ results from the transfer of electrons between (typically) a metal, and a non-metal to form discrete anions, ${X}^{-}$, and cations, ${M}^{+}$, which are bound together in a non-molecular array by strong electrostatic forces. In the melt (or in solution) the ionic bond is disrupted and the ions are free to carry a current under these conditions - of course these conditions require high temperature, or dissolution in a polar solvent.