It depends which type it is. It can be Uranium or Plutonium
It can.
The weapon was developed by the Manhattan Project during World War II. It derived its explosive power from the nuclear fission of uranium 235.
No, it is perfectly legal as long as it is used on your own property.
A single 1 MTon bomb will do it, or four 250 KTon bombs, or a thousand 1 KTon bombs, etc. However more smaller bombs can spread the damage wider than one large bomb.
During World War 2 they set them off to test them, and to make Japan surrender unconditionally.
Uranium is the element commonly used to generate electricity in nuclear power plants and as the primary material for nuclear bombs. It undergoes nuclear reactions such as fission to release large amounts of energy.
How to make nuclear bombs was solved over half a century ago.
It can.
yes
There's no such thing as a bad element. Take arsenic, for instance. It is very poisonous so you might call it a bad element. But you can't make silicon chips or LEDs without arsenic, so it's a good element. Plutonium is another one. They make nuclear bombs out of it. Bad element? Not if you're fueling your nuclear reactor with it and powering a city with the electricity.
nuclear bomb = plutonium + weapon
Countries want them, countries make the laws.
The weapon was developed by the Manhattan Project during World War II. It derived its explosive power from the nuclear fission of uranium 235.
The nuclear material used to make the bombs was from Oak Ridge TN
Generally, no. But nations capable of making nuclear power plants may be able to extend the technology to make weapons.
You think to applications of nuclear physics.
No, it is perfectly legal as long as it is used on your own property.