Why is a translucent, brittle crystal that conducts electricity only as a solution considered an ionic compound and not a metallic compound?

Question

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A metallic compound would be able to conduct electricity as a solid, while an ionic compound can only conduct electricity when its ions are dissociated in a solution.

An ionic compound forms a crystal structure, while metallic compounds often form shapes based on the bond angles.

A metallic compound must be silver in color, while ionic compounds always form translucent crystals.

An ionic compound would break when hit with a hammer, while a metallic compound is malleable and would not shatter.