Which metal stays shiny?

• A. Copper
• B. Aluminum
• C. Galvanized steel
• D. Lead

Answer: (A)

Shine on a metal surface comes from how the surface resists tarnish and how easily you can restore brightness by polishing. Copper, when polished, shows a bright, reflective finish, and the thin oxide layer that forms over time—called patina—actually slows further corrosion. That protective layer helps maintain the underlying shine longer in many environments, and you can bring back a bright surface by cleaning or polishing if it starts to dull.

The other metals tend to dull more quickly or lose their bright look more readily in ordinary conditions: galvanized steel has a zinc coating that can wear away and develop dullness; aluminum forms an oxide coating that often looks dull unless kept polished or treated; and lead forms a dull oxide film as it ages. So copper is the best choice for staying shiny.