Structure 2 / IB Chemistry / Structure 2.3 and 2.4 (lesson / Worksheets)

Structure 2.3 : The metallic model

Structure 2.3.1 : A metallic bond is the electrostatic attraction between a lattice of cations and delocalized electrons.
Structure 2.3.2 : The strength of a metallic bond depends on the charge of the ions and the radius of the metal ion.
Structure 2.3.3 : Transition elements have delocalized d-electrons.

Structure 2.4 : From models to materials

Structure 2.4.1 : Bonding is best described as a continuum between the ionic, covalent and metallic models, and can be represented by a bonding triangle.
Structure 2.4.2 : The position of a compound in the bonding triangle is determined by the relative contributions of the three bonding types to the overall bond.
Structure 2.4.3 : Alloys are mixtures of a metal and other metals or non-metals. They have enhanced properties.
Structure 2.4.4 : Polymers are large molecules, or macromolecules, made from repeating subunits called monomers.
Structure 2.4.5 : Addition polymers form by the breaking of a double bond in each monomer.Structure 2.4.6 : Condensation polymers form by the reaction between functional groups in each monomer with the release of a small molecule.