INBDE (Integrated National Board Dental Examination) Practice Exam

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Which of the following are examples of noble metals?

Gold, Platinum, and Palladium
Iron, Copper, and Zinc
Silver, Gold, and Aluminum
Platinum, Copper, and Nickel

The correct answer is: Gold, Platinum, and Palladium

Noble metals are metals that are resistant to corrosion and oxidation in moist air, making them highly valuable for various industrial and medical applications. In the context of dentistry, noble metals are commonly used in dental prosthetics due to their biocompatibility and durability. Among the options provided, gold, platinum, and palladium are classified as noble metals. Gold, platinum, and palladium exhibit properties such as resistance to corrosion, making them ideal for dental restorations like crowns and bridges. These metals are favored in dentistry for their longevity and ability to maintain their integrity in the oral cavity. In contrast, the other options do not consist solely of noble metals. For example, iron, copper, and zinc are not noble metals and are more prone to corrosion when exposed to moisture. Similarly, silver is considered a noble metal, but aluminum is not classified as a noble metal due to its susceptibility to oxidation. Platinum is a noble metal, while copper and nickel are not in the same category.