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

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

• Alloys usually contain more than one metal and have enhanced properties.

• Explanation of electrical conductivity and malleability in metals.

• Explanation of trends in melting points of metals.

• Explanation of the properties of alloys in terms of non-directional bonding.

• Trends should be limited to s- and p-block elements.

• Examples of various alloys should be covered.