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...Questions what type of bonding do metals have draw a diagram to show the arrangement atoms in metal regular or irregular structure is main purpose alloying are alloys called that can return their original shape how we them happens valence outer electrons forces attraction hold together why conduct electricity present solid sodium metallic mark scheme polymers and nanoscience high density hd thermosoftening thermosetting cross links melting point polymer determined by strength intermolecular make harder gets bigger memory science very small particles looks heat up at properties nanoparticles delocalised so nanoparticle about free move through whole advantages strong electrostatic attractions large surface area makes effective catalysts because nanotubes be used scale circuits as nanowires disadvantages they enter skin therefore bloodstream easily become airborne breathing potentially damage lungs sun screens bandages others positive ions sea...