1. The problem statement, all variables and given/known data My lecturer writes the following in his lecture notes: " There is a binding energy between the particles. Different states can then be characterised by the kinetic energy of the particles. For solids, k.e. << binding energy (looks like SHM) For liquids, single bond energy < k.e. << total binding energy For gases, k.e. >> binding energy." My questions are 1) What is a binding energy? 2) What is a single bond energy? 3) What energies make up the 'total binding energy' in Line 4 ? 2. Relevant equations N/A 3. The attempt at a solution No idea! Any help would be greatly appreciated.