Question

what is a disadvantage of using a space - filling model to show a chemical compound?
space - filling models do not identify the number and type of bonds.
space - filling models do not show all atoms in the molecule.

Explanation:

Space - filling models represent atoms as spheres and show the relative sizes and spatial arrangement of atoms in a molecule. However, they focus on the space occupied by atoms and do not emphasize the bonds between atoms. So, they do not identify the number and type of bonds. On the other hand, space - filling models do show all atoms in the molecule (by representing each atom as a sphere).

Answer:

Space - filling models do not identify the number and type of bonds.