S2.3 The Metallic Model

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

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

• (AHL) Transition elements have delocalized d-electrons.

Tool 1, Inquiry 2, Structure 3.1—What experimental data demonstrate the physical properties of metals, and trends in these properties, in the periodic table?

Reactivity 3.2—What trends in reactivity of metals can be predicted from the periodic table?

Structure 2.4—What are the features of metallic bonding that make it possible for metals to form alloys?

(AHL) Structure 3.1—Why is the trend in melting points of metals across a period less evident across the d- block?