Final answer:
Dental assistants should store scrap amalgam in a designated, sealed container, away from areas where it might be punctured or damaged, as it contains a high mercury content.
Step-by-step explanation:
When a dental assistant handles scrap amalgam, it is important to store it properly due to its high mercury content and the associated toxicity risks. The correct procedure involves placing the scrap amalgam in a designated, sealed container that is labeled for amalgam waste. This container is often provided by a licensed recycling or disposal company that specializes in hazardous materials.
It's important to ensure that these containers are kept in a cool, dry place where they are not at risk of being punctured or damaged, as mercury exposure can have serious health implications. Dental assistants should also be trained in the appropriate handling and storage procedures to minimize the risk of mercury exposure.