Perfect Ionic model

• Assumptions:

  Ions are perfect spheres

  Have no covalent character and are 100% ionic
• Experimental value may differ from theoretical value due to some covalent character caused by the positive ions polarising the negative ions
• Answer

  Experimental lattice enthalpy value allows for / includes covalent interaction / non–spherical ions / distorted ions / polarisation

  Theoretical lattice enthalpy value assumes only ionic interaction / point charges / no covalent / perfect spheres / perfectly ionic


  Question