The correct answer is: D. Zinc
Zinc is a metal that is commonly used in the construction industry. It is a relatively inexpensive metal that is also very durable. Zinc is also a very reactive metal, which means that it can easily react with other elements. When zinc is exposed to the atmosphere, it will react with oxygen and carbon dioxide to form zinc carbonate. Zinc carbonate is a green powder that can be seen on the surface of zinc objects that have been exposed to the elements for a long period of time.
Silver, copper, and aluminum are all metals that are also commonly used in construction. However, these metals do not react
with oxygen and carbon dioxide in the same way that zinc does. Silver will tarnish over time, but it will not form a green coating. Copper will also tarnish, but it will form a blue-green coating. Aluminum will not tarnish at all.Therefore, the only metal that will form a green carbonate coating when exposed to the atmosphere is zinc.