I suggest reading Richard Rhodes books: The Making of the Atomic Bomb and Dark Sun.
Wikipedia also contains good explanations.
There are a number of different types that operate by different principles:
China is not a nuclear free zone. They have many nuclear weapons. Though China has a nuclear policy which states that they are not allowed to produce,fire, or give away these weapons.
"Nukes" is a colloquial term for nuclear weapons, which are explosive devices that derive their destructive power from nuclear reactions. These weapons can cause devastating damage and are considered weapons of mass destruction.
Nuclear surety is the responsibility of the US Nuclear Weapons Program to ensure all associated material, personnel, and procedures related to nuclear weapons are safe, secure, and under positive control.
No, India has both civil nuclear power reactors and nuclear weapons
The only way that how are nuclear weapons are destroyed that these anti-nuclear working group stay together and work together to get these powerful nuclear weapons destroyed. It's possible to destroy nuclear weapons but it is a very hard and dangerous job. Want to know how nuclear weapons are destroyed? These people work as a team by staying together, they also disable nuclear missile launching systems to prevent the nuclear weapons from being launched. They work very carefully to make sure that the nuclear weapon cannot make wide explosions. They destroy the missile very carefully so that the missile cannot make very huge nuke explosion. They also stop nuclear bombs from being dropped by making sure that the bomb is destroyed but they have to place something to destroy the nuclear bomb and they must be very careful because nuclear missiles and nuclear bombs are very powerful. There should be a time bomb to destroy these weapons and don't let these weapons create big explosions. If there is then they place the time bomb on nuclear weapon, they also have to move very far away from the weapon to make sure that they are safe and can't get killed. To destroy nuclear weapons, these nukes have to be sent very far away from the city or from the town so people can't get killed by the nukes.
The US military has Special Weapons Schools where you learn how to operate, maintain, etc. nuclear weapons.
Those that are nuclear, such as the nuclear bombs.
Zambia does not have nuclear weapons.
In nuclear weapons depots.
Nuclear weapons are weapons which are fueled by nuclear energy. Examples of weapons that can be fueled by nuclear energy are missile warheads and bombs.
Nobody, the US was the first country to work out how to actually make nuclear weapons.
Yes, they are nuclear weapons.
NO. Afghanistan does not have nuclear weapons, nor did it have nuclear weapons at any time, nor has it been accused by other countries of having nuclear weapons. Afghanistan is also a signatory to the Nuclear Non-Proliferation Treaty, for what that's worth.
No, Nazi Germany had no nuclear weapons.
Pakistan has about 100 nuclear weapons.
nuclear deterrence - the idea that if you attack me with nuclear weapons then I will attack you back with nuclear weaponsmutual assured destruction - the idea that if you attack me with nuclear weapons then I will totally destroy you with nuclear weapons and if I attack you with nuclear weapons then you will totally destroy me with nuclear weapons - thus any nuclear attack by either party will result in the certain destruction of both parties
Some of the countries have nuclear weapons because they use them as a defense mechanism. The nuclear weapons are intended to be used whenever there is a war.