Yes, but they were only minted in San Francisco. It was one of the few denominations minted that year. Coin production was very spotty due to low demand during the Great Depression.
There's more information at the Related Question.
There is no silver in a 1972 US half dollar.
There are .1479 troy ounces of silver in a 1967 US Kennedy half dollar.
There were no US silver dollars made 1929 to 1933 due to the Great Depression. If you have one dated 1933 it is a fake. Please check your coin's date, denomination, and issuing country and post a new question with more details that could help ID it. If you have what appears to be a U.S. Peace dollar with that date on it, it is a fantasy piece or a counterfeit. If your coin says HALF DOLLAR on the back, then it's a 50¢ piece and not a silver dollar.
12.50 grams for a silver half dollar
There are .3617 troy ounces of silver in a 1958 Franklin half dollar.
There are .3617 troy ounces in a 1962 US half dollar.
No. Not a single US coin made the US mint is 100% silver. 1969 US half dollar are made of a 40% silver.
If the coin is a US Kennedy half dollar dated 1974 it has no silver in it and is face value.
No US silver dollars were made after 1935, look at the back of the coin for 'Half Dollar'.
10-20 years for counterfeiting. No US silver dollars were minted 1929-1933.
Please check the coin's date and denomination US silver dollar production was suspended between 1905 and 1920 inclusive, so there are no 1917 dollar coins. If your coin says HALF DOLLAR on the back, it's a half dollar, not a silver dollar.
With a date of 1979 the coin has no silver in it. 1969 was the last 40% silver circulating US half dollar. The coin is worth 50 cents.