NECTA Form 1–4 (CSEE) · Form 2 · Chemistry (Form 2) · Notes · Unit 4: Chemical Bonding, Intermolecular Forces & Molecular Structure

Unit 4: Chemical Bonding, Intermolecular Forces & Molecular Structure

Official NECTA CSEE Form 2 Chemistry Topic 2.4: Fundamental cause of bonding (octet and duplet rules), ionic/electrovalent bonding with Lewis dot-and-cross diagrams (NaCl, MgO, CaCl2) and giant crystal lattice, covalent bonding (single, double, triple bonds in H2, Cl2, H2O, NH3, CH4, O2, N2), coordinate (dative) bonding in ammonium and hydronium ions, metallic bonding (sea of delocalized electrons model, malleability, ductility, conductivity), intermolecular forces (Van der Waals, dipole-dipole, hydrogen bonding), giant structures (diamond vs graphite vs silica), and comprehensive physical properties matrix.