2. The model on the right looks bumpy, but when you break a large salt crystal in two, the edges of the split often look straight and feel smooth. Is there a problem with the model? Use what you have learned about atoms to explain.

The model you are referring to likely represents a macroscopic view of a salt crystal, which appears bumpy or irregular at a larger scale. However, when you break a large salt crystal, the edges of the split often appear straight and feel smooth. This observation suggests that there may be a discrepancy between the macroscopic model and the atomic structure of the salt crystal. At the atomic level, salt (sodium chloride, NaCl) is composed of a regular arrangement of sodium and chloride ions in a crystalline lattice. This lattice structure is highly ordered, and the bonds between the ions are strong and uniform. When a salt crystal is broken, it tends to cleave along specific planes of weakness in the crystal lattice, which are determined by the arrangement of the ions. These planes are often smooth and straight because they correspond to the orderly arrangement of atoms in the crystal. The "bumpiness" observed in the macroscopic model may arise from imperfections, impurities, or irregularities in the crystal structure, but these do not affect the overall atomic arrangement significantly. The smoothness of the broken edges reflects the underlying atomic structure, which is much more uniform than the surface appearance of the crystal. In summary, the model may not accurately represent the atomic-level order of the salt crystal. While the macroscopic view may show irregularities, the atomic structure is highly ordered, leading to the smooth and straight edges observed when the crystal is broken. This highlights the importance of considering both macroscopic and atomic perspectives when studying materials.