Answer:
See explanation
Step-by-step explanation:
Zinc is a metal and as such can undergo corrosion when exposed to moisture.
Two gases in the atmosphere that can react with Zinc metal and covert it to Zinc carbonate are carbon dioxide and water vapour.
Zinc is oxidized to ZnO in the atmosphere by water vapour. This ZnO subsequently reacts with CO2 to yield ZnCO3.