It's either not JFK or not a dollar. JFK is on the half dollar. President Eisenhower was on the dollar in 1972.
Regardless, it's made of the same material as all other clad coins. It has outer layers of 25% nickel and 75% copper bonded to a core of 100% copper.
If you have one in circulated condition, it is only worth face value.
40% silver 60% copper
Not all silver. It is referred to as silver clad. Silver on both sides (40% by weight) with copper in the center. The semi-solid silver Kennedy half dollar stopped production in 1964, made of 90% silver. See the related link for more information.
1972
You don't.
Apollo 17 was launched, from the Kennedy Space Center
the 1972 Kennedy half dollar is worth 50 cents in circulated condition, or about a dollar in uncirculated condition
A 1972 Kennedy half dollar contains no silver and is worth 50 cents.
Gold-plated but not gold. All 1972 halves were made of copper-nickel and are only worth 50 cents in circulated condition.
50 cents.
It's worth 50 cents.
All circulating half dollars dated 1971 and later are made of copper-nickel, using the same "sandwich" composition as dimes and quarters.
No, there have been many US dollar coins struck before and after 1972. However, the US Mint did make a dollar coin in 1972 (it was the second year for the Eisenhower Dollar)
The 'H' adds nothing to the 50 cent value of the coin.
Yes, proof versions of the Kennedy half dollar were made. These will have the S mintmark.
The bicentennial Kennedy half dollar is made of a copper-nickel alloy, special collectors coins were struck in 40% silver but they all have "S" mintmarks.
Trade dollars were not made in 1972. Check and make sure you have the correct date.
Check that coin again. Eisenhower was on a large dollar, and Kennedy is on the half dollar. Either way, a circulated specimen is worth face value.