There were two atomic bombs use during WWII. They were called the 'Little Boy' and 'Fat Man.'
Blowing up your enemies is not the way to solve all problems. So atomic weapons really did not need to be used in WWII.
Atomic/nuclear weapons
Weapons used during WW II included rifles, tanks, hand grenades, machine guns, and atomic bombs (only at the end).
You're question is not clear. If you mean last used during World War II, it is Nagasaki on August 9, 1945. If not, atomic weapons are still used today.
Nagasaki and Hiroshima in Japan.
In 1945 two atomic weapons were used against Japan .
Atomic bomb
Nuclear weapons have only been used in combat on Japan.
The United States used the atomic bomb offensively during WWII. That is pretty close to nuclear weapons.
The United States has used atomic bombs as weapons .
First of all Kid they didn't use Nuclear weapons in WW2...They used two Atomic Bombs