IB Chemistry HL 100113

Structure 2.3: The metallic model

#Structure 2.3.1

Metallic bonding

A metallic bond is the electrostatic attraction between a lattice of cations and delocalized electrons.

Explain the electrical conductivity, thermal conductivity and malleability of metals.

Relate characteristic properties of metals to their uses.

#Structure 2.3.2

Strength of a metallic bond

The strength of a metallic bond depends on the charge of the ions and the radius of the metal ion.

Explain trends in melting points of s and p block metals.

A simple treatment in terms of charge of cations and electron density is required.

#Structure 2.3.3 (AHL)

Transition metals

Transition elements have delocalized d-electrons.

Explain the high melting point and electrical conductivity of transition elements.

Chemical properties of transition elements are covered in Reactivity 3.4.

Structure 2.2
The covalent model
Structure 2.4
From models to materials