What chemical properties are required in a coin?

Answer 1

Most general circulation coins are made of alloys - combinations of brass, zinc, copper, nickel etc.

Collector coins are still made of gold and silver. .999 silver and for some recent gold coins .9999

Answer 2

A coin should be made of a durable material that is resistant to corrosion, such as metal alloys like nickel, copper, or zinc. It should also have a specific weight and density to ensure that it is easily recognizable and distinguishable from other objects. Additionally, coins often have specific magnetic or electromagnetic properties for use in vending machines or coin-operated devices.

Answer 3

Up till 1964 U.S. dimes, quarters, halves, and (earlier) dollars were normally made of an alloy of 90% silver and 10% copper. Other countries have used different alloys with silver contents ranging from 95% down to less than 50%.

Modern dimes, quarters, and halves do not contain any silver at all. They have outer layers composed of 75% copper / 25% nickel, which gives them a somewhat silvery appearance but in reality is darker and less reflective than the silver alloy it replaced.

Dollars are of course made of brass to give them a distinctive golden appearance.

Answer 4

Metals can bond with other metals easier than nonmetals and metalloids can. Since metals can be quite expensive, this is good, because you can make a coin using less metal and a nonmetal or metalloid while being able to retain the durability of the coin.

Answer 5

For modern U.S. coinage, the metals used are copper, nickel, and/or zinc. Sacagawea/Presidential dollar coins also have a bit of manganese.

Answer 6

- to be not reactive
- to be not toxic

Answer 7

The alloy of a coin must be nontoxic and resistant to corrosion and errosion.

Answer 8

The alloy of coins must be nontoxic, resistant to corrosion and errosion, nonreactive.

Answer 9

gold,silver,and zinc

Answer 10

Nickel, Zinc, Copper, Iron