Question

if a compound is a brittle, blue crystal with a high melting point, what type of compound is it?
not enough information provided
ionic compound
metallic compound
covalent compound

Explanation:

Ionic compounds are typically brittle, form crystals, and have high melting points due to strong ionic bonds. Metallic compounds are malleable and ductile. Covalent compounds (except network covalent) usually have lower melting points. Since the properties (brittle, crystal, high - melting point) match ionic compound characteristics.

Answer:

ionic compound