Brass as a Metallic Alloy

Steps:

• Identify brass as an alloy of copper and zinc, both metals.
• Recall that metallic alloys share properties of pure metals, including delocalized electrons.
• Evaluate options based on bonding types: metallic (A), ionic (B), or compound definitions (C, D).
• Select the option matching metallic structure.

Why A is correct:

• Metallic bonding in alloys like brass involves a lattice of positive metal ions surrounded by a sea of delocalized electrons, enabling electrical conductivity.

Why the others are wrong:

• B describes ionic compounds, where ions move in solution but not in solid metals.
• C applies to ionic compounds like salts, not metal-metal alloys.
• D mislabels alloys as chemical compounds; they are homogeneous mixtures, not fixed-ratio compounds.

Final answer: A