As of 2012, the countries with the most nuclear weapons, counting actively deployed and stockpiled ones, are, in order of most to least:
RussiaUS
The most deadliest weapon in the world is a Nuclear bomb/Nuclear missle. If it in guns you mean well i say best guns are the MG42, AK47 and the Barrett M82 Sniper rifle. -------- I suppose that now the most dangerous weapon is the hydrogen bomb.
Most did their own independent development.
It depends on what war you mean. Bombs, nuclear to be precise, were some of the most feared weapons. Tanks also were feared highly.
All countries that have exploded nuclear devices have exploded their first devices. The USA was the first to detonate such a device and the only country to use nuclear warheads in combat. The most recent countries to test nuclear devices are India, Pakistan, and North Korea.
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.
Hard to say. Many countries make nuclear weapons behind other countries backs. Some countries are not announcing when they complete testing or development for nuclear warheads, so the world may never know.
Time, Distance, and Shielding
As the category for this question is "Nuclear weapons", I'm presuming it refers to nuclear arms.As of 2012, the three countries with the largest stockpiles of nuclear weapons are, in order from most to least:RussiaUnited StatesFrance
nuclear bomb
North Africa.
The nuclear bomb
a VERY powerful nuclear weapon i think its the most powerful one
The most powerful nuclear weapon detonated was the Tsar Bomb which was a 50 megaton thermo-nuclear bomb that was tested in October 30, 1961, in the Novaya Zemlya archipelago
It is the most destructive weapon ever created.
Nuclear bombs, espacially the 'dirty' ones.
The nuclear bomb