Which one of the following metals does not form amalgam?

Correct Option

An amalgam is an alloy formed between mercury and another metal. Most metals, including zinc, copper, and magnesium, readily form amalgams with mercury. However, iron is an exception as it does not form an amalgam under normal conditions. This characteristic property allows mercury to be safely stored in iron containers without reaction. While iron amalgams can be synthesized under highly specialized laboratory conditions, they are generally unstable, confirming iron's non-amalgamating nature in typical environments.

Incorrect Options

• Zinc: Zinc readily forms an amalgam with mercury. Zinc amalgams are utilized in various applications, including dental fillings and electrochemical processes.
• Copper: Copper forms amalgams with mercury. These amalgams have applications in fields such as dentistry and for electrical contacts.
• Magnesium: Magnesium is capable of forming an amalgam with mercury, although its formation is less common compared to zinc or copper amalgams.