EVERYDAY SCIENCE

Detailed explanation-1: -Copper, Ag and Au are known as coinage metals because they were used to make coins. All the metals are noble w.r.t. chemical activity.

Detailed explanation-2: -They are classified as coinage metals since they were used in making coins.

Detailed explanation-3: -Collectively known as the “coinage metals” because of their former usage, these elements were almost certainly the first three metals known to man. All of them occur in the elemental, or “native”, form and must have been used as primitive money long before the introduction of gold coins in Egypt around 3400 bc.

Detailed explanation-4: -Historically, most coinage metals (or alloys) are from the three nonradioactive members of group 11 of the periodic table: copper, silver and gold, the copper usually being augmented with tin and often other metals to form bronze.

Detailed explanation-5: -Copper, silver, and gold are coinage metals.