How the ideas connect
A good science page should make the connection visible, not just list definitions.
Chemical bonding
Chemical bonding describes how atoms are held together through interactions involving electrons and nuclei. Ionic, covalent and metallic models highlight different limiting behaviours rather than three completely isolated worlds.
The useful question is not only “what bond is this?” but “what does this model help predict?”
Valence electrons
Valence electrons are the electrons most directly involved in bonding and chemical reactivity, although the exact boundary between valence and core can depend on context.
For main-group elements they provide a simple route to periodic similarities; transition metals require more care.
Electronegativity
Electronegativity is a model for an atom’s tendency to attract electron density when it is bonded.
Differences in electronegativity help us reason about bond polarity, but they do not turn bonding into a rigid binary classification.
Molecular polarity
Bond polarity and molecular geometry work together to determine whether a molecule has a net electric dipole.
A molecule can contain polar bonds yet have little or no overall dipole when the bond dipoles cancel by symmetry.
What to notice
A good science page should make the connection visible, not just list definitions.
Sources
IUPAC Gold Book · NIST · BIPM