Ionic vs. Covalent Bond Directionality

Visualizing localized electron sharing vs. omnidirectional electrostatic forces

Covalent Bond (Directional)

In H2, the bond is formed by sharing a pair of electrons (shown as
e-
e-
) specifically between the two nuclei. The positive nuclei are being pulled in a specific direction toward the shared electrons.
+
Hydrogen Nucleus (+)
e-
e-
Shared Electron Pair (Negative charges pulling Nuclei)

Ionic Bond (Non-Directional)

The Na+ ion is attracted by Cl- ions and repelled by Na+ ions in all directions equally. There is no specific "axis" for the force.
Na+
Sodium Ion (Na+)
Cl-
Chloride Ion (Cl-)
→ Attraction
→ Repulsion