How is a metallic compound different from an ionic compound? Select all that apply.

A. Metallic solids conduct electricity, while ionic solids do not.

B. When hit with a hammer, a metallic compound will change shape, while an ionic compound is likely to break.

C. Metallic compounds form crystal structures, while ionic compounds are often powders or gases.

D. Metallic compounds can conduct electricity only in molten form, while ionic compounds can conduct electricity in any form.