Magnetic Sodium Chloride Molecule Kits. 4x4x4. These 3D Molecular Designs Magnetic Sodium Chloride Models will help students to understand the structure and properties of ionic compounds. Each ion has embedded magnets to simulate ionic bonding. The x x Lattice contains 64 ions (32 Sodium and 32 Chlorine) and the x x Lattice contains 27 ions (13 of type of ion and 14 of the other.) Lattices do not include water molecules, which are available, if required, in the magnetic water molecule kits. The models will help students gain an understanding of: Ionic structure and bonding, The cubic nature of salt crystals, Efficient lattice packing, High melting temperature, and Brittleness Cleavage planes.