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• Within the metallic lattice, the atoms lose their outer shell electrons and
become positively charged ions. The outer electrons no longer belong to a
particular metal atom and are said to be delocalized. They move freely between
the positive metal ions like a sea of electrons.
• A metallic bond is the strong electrostatic forces of attraction between the
metal cations and the sea of delocalized electrons
• Metallic bonds are often graphically represented by a diagram of the metallic
lattice.
Properties of Metals:
• Have high melting/boiling points (as the strong electrostatic forces in the
metallic lattice require a large amount of energy to break).
• Conduct electricity in all states,
• Are malleable and ductile (as, when force is applied, layers of cations can slide
over each other).
Past Paper Questions :
P2 :
Here are 5 IGCSE Chemistry multiple-choice questions on Chemical Bonding
in increasing difficulty:
1. What type of bonding occurs between sodium and chlorine in sodium
chloride (NaCl)?
A) Covalent
B) Ionic