Molecular Model Set – Sodium Chloride (Compact Type – 27 Atoms) This molecular model set represents the crystal structure of Sodium Chloride (NaCl) in a compact lattice arrangement with 27 atoms. The compact design closely mimics the actual packing of sodium (Na⁺) and chloride (Cl⁻) ions in a solid crystal, providing a realistic view of the ionic structure. It clearly demonstrates the cubic geometry, coordination number, and strong electrostatic interactions between ions. The model is made using durable, color-coded spheres fitted closely together to show dense packing. It is ideal for educational use in schools and colleges to explain solid-state structures and ionic bonding. This compact model enhances students’ understanding of crystal lattice formation and spatial arrangement of atoms in a more realistic manner.