Three, one that was tested in the US, one was deployed at Hiroshima and the third at Nagasaki. Bombs were under construction, but no further weapons were ready for use by the surrender date. A fourth bomb was made by Los Alamos before Japan agreed to surrender, but did not arrive in San Francisco to be flown across the Pacific until August 18, four days after the Japanese agreed to surrender (but before the formal signing of the agreement which happened in September). This is confirmed by declassified documents obtained by Chuck Hansen via FOIA requests and summarized in his work Swords of Armageddon.
As 3 more bombs were scheduled for production and delivery in September (ibid.) it is almost certain that Los Alamos completed the first of these 3 within a few days before or after the formal signing. However documents on the completion date of this bomb have not been released. If they did complete this bomb prior to the signing, this would make five in total were built during WW2.
The next definite data in Swords of Armageddon gives bomb production up to the end of the 1946 Operation Crossroads: total bombs built 9, total bombs detonated 5, bombs remaining in stockpile 4.
Note: bombs of this era when built were not assembled. for example a MK-III Fatman came in two crates of parts and took 3 days of final assembly in the field before use.
Plutonium was and still is used for atomic bombs. The atomic bombs you are talking about would be fat man and little boy. They were the two used to bomb Hiroshima and Nagasaki Many people were killed when the b-29 bomber dropped fat man.
In total, about 215,000 people were killed during the atomic bombings onto Japan in 1945. 75,000 died in Nagasaki and 140,000 died in Hiroshima.
At this time (2012) neither the US or Russia makes any. Other countries may be making small numbers.
It is recored that 854 tallboy bombs were produced during World War 2. It was in service from 8 June 1944 - 25 April 1945.
2 atomic bombs and 2 million HE bombs and 5 million incendiary fire bombs
None, nobody had either the material or infrastructure to do so.
None. The first atomic bomb was dropped decades after World War 1 finished. Atomic bombs weren't used in war until World War II.
4 were built during WW2trinitylittle boyfat manunnamed, unused
The Manhattan Project began in 1942 and ended in August 1947, with the establishment of the Atomic Energy Commission. A rough estimate is that in this time 15 to 20 atomic bombs had been built, with 5 of those detonated, leaving a stockpile by the time the Manhattan Project ended of 10 to 15 atomic bombs.
More than a thousand in total. Only one was tested during WW2.
As both atomic bombs and supernovas vary in yield, this question has no single answer.
Atomic bombs- Zero.