the only property listed that is not characteristic of ionic compounds is
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http://www.elmhurst.edu/~chm/vchembook/143Aioniccpds.html
To determine the property listed that is not characteristic of ionic compounds, we first need to understand the properties commonly associated with ionic compounds. Ionic compounds are formed through the transfer of electrons between a metal and a non-metal. As a result, they typically exhibit the following properties:
1. High melting and boiling points: Ionic compounds have strong electrostatic attractions between positive and negative ions, which require a significant amount of energy to overcome. This leads to high melting and boiling points.
2. Crystalline structure: Ionic compounds arrange themselves in a regular repeating pattern, forming a crystal lattice structure. This provides them with a well-defined shape and regular arrangement of ions.
3. Good electrical conductivity when dissolved in water or molten: In their solid state, ionic compounds do not conduct electricity because the ions are locked into position. However, when dissolved in water or melted, the ions become mobile and can carry electrical charges, thus allowing for the conduction of electricity.
4. Brittle nature: Ionic compounds are rigid and tend to shatter when subjected to stress due to the attraction and repulsion forces acting between the ions. This gives them a brittle nature.
Based on these properties, the only property listed that is not characteristic of ionic compounds is the "Good electrical conductivity when dissolved in water or molten." Ionic compounds do exhibit good electrical conductivity under these conditions, so this property is indeed characteristic of them.