Final answer:
Identical charge, a similar ionic radius, and extensive substitution are characteristics of a solid solution. This concept is related to the ability of ions to replace each other in a crystal lattice when their sizes and charges are similar. So the correct answer is option (B).
Step-by-step explanation:
The criteria of identical charge, similar ionic radius, and extensive substitution are all indicative of a solid solution. In the context of ionic compounds, a solid solution typically involves a mixture of cations (or anions) that can replace each other in the crystal lattice due to their similar sizes and charges. Such substitutions can occur extensively if there is enough similarity between the ionic radii and the electrical charges of the substituting ions.
For example, simple ionic compounds with similar-sized cations and anions, such as CsCl, can form a specific type of crystal structure called a simple cubic structure. Ionic solids, like sodium chloride, are known for their structure consisting of alternating positively charged cations and negatively charged anions, typically forming from a combination of Group 1 or 2 metals and Group 16 or 17 nonmetals.