Fissionable material sufficient to fission if it comes together, a lab safe enough to handle such material, and mechanisms sufficient to bring the pieces of fissionable material together in what is called "critical mass".
Bare bones, you'd have a very large - and hard to transport - atomic bomb, of WWII size.
If you are wondering - given how easy that would be nowadays - why everyone doesn't have one, it's due to them being valueless without proper means of delivery. Which means they have to be small and yet still powerful, and be mounted on a very long range missile with a sophisticated guidance system.
If your city is involved in an atomic attack, there will be no resources after that. Some one has to come over and help.
To defend against a possible Nazi atomic bomb!
Leo Szilard invented the atomic bomb in 1933, but no one person can be credited with creating it. Remember the US spent $2,000,000,000 on constructing and operating the huge industrial infrastructure needed to build them before a single bomb could be built!
no
Manhattan Project
They did steal all the information needed to make it. Read "The Making of the Atomic Bomb" by Richard Rhodes
he did not build the atomic bomb
the Nazi didn't build the atomic bomb the Americans did....
To defend against a possible Nazi atomic bomb!
1945
No, they designed but did not build them.
Leo Szilard invented the atomic bomb in 1933, but no one person can be credited with creating it. Remember the US spent $2,000,000,000 on constructing and operating the huge industrial infrastructure needed to build them before a single bomb could be built!
the first atomic bomb.......................................
the Manhattan project
Yes, that was its codename.
no
Manhattan Project
It takes very little time to build an atomic bomb, once a country has the necessary industrial infrastructure to produce the fissile material.