4.4.1 Describe the metallic bond as the electrostatic attraction between a lattice of positive ions and delocalized electrons
- the valence electrons in metals become detached from the individual atoms so that metals consist of a closely-packed lattice of positive ions in a sea of delocalized electrons
- a metallic bond is the attraction that the positive ions have for the delocalize electrons between them
4.4.2 Explain the electrical conductivity and malleability of metals
- metals are malleable and can be bent and reshaped under pressure
- they're malleable because the closely-packed layers of positive ions can slide over each other without breaking more bonds than are made
- for conductivity to occur, the substance must possess electrons or ions that are free to move
- the delocalized electrons in metals (and graphite) are excellent conductors
- molten ionic salts also conduct electricity but are chemically decomposed in the process