the world will blow up
No nuclear energy, no nuclear weapons
Nothing
That depends on whose wrong hands.
Some one would invent them
Not very likely countries as are now getting rid of their nuclear weapons to aviod a nuclear war
Not bloody likely! It means nations destroy their nuclear weapons, quit making anymore, and all somehow forget how they are made. But as there are no real secrets about making them, that isn't gonna happen.
an element becomes a totally different element..
Yes! A nuclear weapon (especially a small one (as much as small can be applied to nuclear weapons)) can miss enough to render the weapon tactically ineffective. This could happen with ICMS if the guidance system failed, sending the weapons (in a MIRV) into the ocean, or onto a remote piece of land.
A nuclear weapon is used to prevent being threatened by other nuclear countries. Say, for example, France got rid of all of it's nuclear weapons, tiny countries that had a nuclear weapon would be able to bully them into accepting bad deals or presurring them into not reacting when things happen. Most countries in the world would probably like to dispose of their nuclear weapons but they can not due to the fact of little countries with problems that will keep them would be able to threaten them and hold the world by it's throat.
There is no use made except in nuclear weapons. Attempts to make fusion happen on earth in a controlled way for power production have not succeeded yet.
On December 8, 1966, the USSR and the United States signed a treaty saying no nuclear weapons in space.
in a nuclear powerplant