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Sodium Chloride, NaCl. The classic case of ionic bonding, the sodium chloride molecule forms by the ionization of sodium and chlorine atoms and the attraction of the resulting ions. An atom of sodium has one 3s electron outside a closed shell, and it takes only 5.14 electron volts of energy to remove that electron. The chlorine lacks one electron to fill a shell, and releases 3.62 eV when it acquires that electron (it's electron affinity is 3.62 eV).
Is NaCl a molecule? No. NaCl is an ionic compound and does not form molecules. It forms a crystal lattice in which every ion is surrounded by six ions of opposite charge. The formula NaCl is a foâ¦rmula unit which gives the simplest whole number ratio of ions in the compound.