What are silver made out of and how do you use silver?

US silver dollars dated 1935 or before are silver, some special collectors coins for the Eisenhower series were struck in 40% silver but only from 1971 to 1976 and were not released for circulation.

Because silver is far too expensive. Coins used to contain silver until about 1920 in the UK, 1965 in the U.S., and 1968 in Canada. Since then they are made from a mixture of copper and nickel, so...

Yes, if they are dated 1935 or earlier they have 90% silver.

No, you do not clean coins. Cleaning coins will only damage their value. If you feel you must clean a coin, take it to a coin dealer and see what he recommends to clean the coin, however, they will...

silver. its an element