The last year of the 95% copper cents was 1982. Midway through 1982 the US mint replaced the 95% copper coins with copper plated zinc cents, so there are some 1982 cents that are copper, others are zinc. However, all Lincoln cents prior to 1982 are 95% copper, and all circulation Lincoln cents dated 1983 and later are copper plated zinc.
The last actually US cents were struck in mid-1982. Coins from that year exist in both bronze and copper-plated zinc varieties.
1932 was the last year gold coins were struck for circulation.
It was 1964 when the last coins in the US were made from 90% silver.
Approximetely 28 billion
Yes, but 1964 was the last year for circulating 90% coins.
1964 was the last year for 90% silver coins and 1970 was the last for 40% silver coins. Special Bicentennial (1776-1976) collectors coins were made in 40% silver. From 1992 to date proof collectors coins have been struck in 90% silver.
The US Mint continues to produce half dollar coins today although they are seldom seen in circulation.
US coins have been struck Copper, Nickel, Gold, Silver, Steel, Zinc, and Bronze. There have been so many different combinations that it would take a pamphlet to list all the different variations.
Quarters and most other silver US coins contained 10% copper; the last coins made of that alloy were dated 1964. The US has never made solid silver circulating coins. Pure silver is far too soft for use in coins, so it was always alloyed with copper for hardness.
1964 for dimes, quarters, and half dollars at 90% silver. Halves were then 40% silver until 1970. The only silver coins since then were special collector issues, but none for general circulation.
2-cent coins were made of the same bronze alloy as 1-cent coins: 95% copper and 5% tin/zinc. Their weight was exactly twice that of a bronze cent, as well - 6.22 gm.
Look at the coin again, no US dollar coins were made in 1936, 1935 was the last year.