Which answer would score higher? Not sure where to start? Explain this Answer A Model Q is better because a metal is a giant, regular structure, unlike Model P’s small cluster. Its outer electrons are delocalised, so they can move throughout the structure rather than staying with individual atoms. The metal atoms share these delocalised electrons, and this sharing produces strong metallic bonds that hold the giant structure together. Model P therefore misrepresents both the scale and the electron arrangement. Answer B Model Q is better because a metal is a giant, regular structure, unlike Model P’s small cluster. Its outer electrons are delocalised, so they can move throughout the structure rather than staying with individual atoms. The electrons occupy the spaces around the metal atoms and move freely there. Model P therefore misrepresents both the scale and the electron arrangement, although it still contains metal atoms.