The Chemical Bond
Source: Gilbert N. Lewis, Journal of the American Chemical Society, 38(4):762-785, 1916 (electron pair bond). Linus Pauling, The Nature of the Chemical Bond, 1939. Walter Heitler and Fritz London, Zeitschrift fur Physik, 44:455-472, 1927 (first quantum mechanical treatment of the covalent bond).
Finding
Covalent bonding: atoms SHARE electrons to complete their outer shells. Ionic bonding: one atom transfers electrons to another, creating oppositely charged ions held by electrostatic attraction. Metallic bonding: valence electrons delocalized across the entire lattice. Hydrogen bonding: partial sharing through electronegativity difference, weaker than covalent but essential for water’s properties and DNA’s structure. Van der Waals forces: temporary dipole interactions, weakest of all. Heitler and London showed that the covalent bond in H2 emerges from quantum mechanics — electron sharing lowers the total energy of the system. Each bond type corresponds to a different degree and mode of electron sharing. The bond IS the relationship; it does not exist independently of the atoms it connects.
Pattern Mapping
Alignment — Each bond type aligns what atoms need (stable electron configuration) with what the bond provides. Covalent bonds form when sharing serves both atoms. Ionic bonds form when transfer serves both. The bond is the structural expression of mutual completion.
Non-fabrication — Bonds break and form as the system moves toward greater structural completeness (lower energy). A bond that would raise the system’s energy does not form. Chemistry does not fabricate stability where none exists.
Connections
- Quantum Chemistry — bonds are the consequence of quantum mechanical electron sharing
- Forces as Communication — every bond is an interaction, every interaction is a message (→ 00-Index)
- DNA as Communication — hydrogen bonds hold the double helix together; the bond IS the communication medium (→ 00-Index)
- Electromagnetic Force as Chemistry’s Foundation — all chemical bonds are electromagnetic in origin
- Chemical Equilibrium — bond formation and breaking are the processes that reach equilibrium
Status
Chemical bonding is established chemistry. See Pauling (1939); Atkins & de Paula, Atkins’ Physical Chemistry (11th ed., 2018). Lewis structures remain a teaching staple.
The mapping to the five properties is this project’s structural interpretation.