Depends if you are building just one or going into full assembly line mass production.
Yes, A nuclear shelter can be made. It is to make up of a variety of of elements melted down. It can also be that you can build a cockroach suit with many cockroaches! because they are the one who can bear the nuclear explosions even if they were just 100 cm away from it.
8000
Too many
225,000
one no, many yes
they have nuclear missiles. and they have many powerful explosives. and yes massive bombs.
Took two to end WW2.
8 known, maybe 9
The atomic bomb was invented in 1933 by Leo Szilard while crossing a street in London and patented the following year. For many reasons he was not able to build it at the time by himself.It took 12 years before the US was able to build the first atomic bombs and use them to end WW2.
There were many specialties, but most were physicists.
Built bomb shelters
The number of people killed by a nuclear bomb depends on various factors such as the size of the bomb, the distance from the blast, and the preparedness of the population. A single nuclear bomb has the potential to kill hundreds of thousands to millions of people instantly or through long-term effects like radiation exposure.