Chlorine atom, Sodium atom

Chlorine ion, Sodium ion

Sodium and Chlorine atoms.

At the top of the figure above you see a representation of the atomic structure of the Na and Cl atoms.

The Chlorine atom.

The Sodium atom.

When the Na and Cl atoms come into physical contact.

The Cl ion

The Sodium ion.

When ions of opposite charge meet they are attracted and form an ionic bond