A. Cu, Ag, Au
B. Zn, Cd, Hg
C. Fe, Co, Ni
D. Cu, Zn, Ni
A. Cu, Ag, Au
Coinage metals are elements of subgroup I-B and these include:
- Copper (Cu)
- Silver (Ag)
- Gold (Au)
Subgroup I-B, also known as group 11, is located on the left side of the p-block in the periodic table. These elements are known for their excellent electrical conductivity, malleability, and ductility. Their unique properties make them ideal for use in various applications, including:
- Electrical wiring: Copper is widely used in electrical wires due to its high conductivity.
- Jewelry: Silver and gold are popular choices for jewelry because of their lustrous appearance and ability to be shaped into intricate designs.
- Electronics: Gold is used in electronic components due to its resistance to corrosion.
- Coins: Historically, copper, silver, and gold were the primary metals used to mint coins. Although less common today, some collector’s coins and high-value currencies may still incorporate these metals.