Articles on bonding theory

• Article considering various levels of bonding theory to explain Why doesn't carbon form a molecule with four covalent bonds?
• Article on antibonding orbitals
• Article on hybridization and electronegativity
• Article comparing the valence-bond and molecular-orbital theories' descriptions of CO and SO₄
• Article explaining Why is carbon the only element to link in long chains?
• Article explaining why we call a molecule with two unpaired electrons a "triplet" in terms of the Pauli Exclusion Principle.