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  2. List of parties to the Treaty on the Non-Proliferation of ...

    en.wikipedia.org/wiki/List_of_parties_to_the...

    The list of parties to the Nuclear Non-Proliferation Treaty encompasses the states which have signed and ratified or acceded to the international agreement limiting the spread of nuclear weapons. On 1 July 1968, the Nuclear Non-Proliferation Treaty (NPT) was opened for signature. The three depositary states were the Soviet Union (and later its ...

  3. Treaty on the Non-Proliferation of Nuclear Weapons - Wikipedia

    en.wikipedia.org/wiki/Treaty_on_the_Non...

    The Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Non-Proliferation Treaty or NPT, is an international treaty whose objective is to prevent the spread of nuclear weapons and weapons technology, to promote cooperation in the peaceful uses of nuclear energy, and to further the goal of achieving nuclear disarmament and general and complete disarmament. [3]

  4. List of parties to the Comprehensive Nuclear-Test-Ban Treaty

    en.wikipedia.org/wiki/List_of_parties_to_the...

    States Signatories are Members of the CTBTO Preparatory Commission. On September 24, 1996, the Comprehensive Nuclear-Test-Ban Treaty (CTBT) was opened for signature. All five nuclear weapons states recognized under the Nuclear Non-Proliferation Treaty ( China , France , Russia , the United Kingdom , and the United States ) signed the treaty ...

  5. List of weapons of mass destruction treaties - Wikipedia

    en.wikipedia.org/wiki/List_of_weapons_of_mass...

    A variety of treaties and agreements have been enacted to regulate the use, development and possession of various types of weapons of mass destruction (WMD). Treaties may regulate weapons use under the customs of war (Hague Conventions, Geneva Protocol), ban specific types of weapons (Chemical Weapons Convention, Biological Weapons Convention), limit weapons research (Partial Test Ban Treaty ...

  6. List of parties to the Treaty on the Prohibition of Nuclear ...

    en.wikipedia.org/wiki/List_of_parties_to_the...

    The list of parties to the Treaty on the Prohibition of Nuclear Weapons encompasses the states which have signed and ratified or acceded to the Treaty on the Prohibition of Nuclear Weapons, a multilateral treaty outlawing nuclear weapons. On 20 September 2017, the treaty was opened for signature. [1]

  7. Weapons-grade nuclear material - Wikipedia

    en.wikipedia.org/wiki/Weapons-grade_nuclear_material

    The critical mass for any isotope is influenced by any impurities and the physical shape of the material. The shape with minimal critical mass and the smallest physical dimensions is a sphere. Bare-sphere critical masses at normal density of some actinides are listed in the accompanying table. Most information on bare sphere masses is ...

  8. Nuclear proliferation - Wikipedia

    en.wikipedia.org/wiki/Nuclear_proliferation

    At present, 189 countries are States Parties to the Treaty on the Nonproliferation of Nuclear Weapons, more commonly known as the Nuclear Non-Proliferation Treaty or NPT. These include the five Nuclear Weapons States (NWS) recognized by the NPT: the People's Republic of China , France , Russian Federation , the UK , and the United States .

  9. Treaty of Tlatelolco - Wikipedia

    en.wikipedia.org/wiki/Treaty_of_Tlatelolco

    France signed Protocol I applying to its Caribbean islands and French Guiana in 1979 but only ratified in 1992. All five NPT-recognized nuclear weapon states ratified Protocol II by 1979. Cuba was the last country to sign and to ratify, in 1995 and on 23 October 2002, completing signature and ratification by all 33 nations of Latin America and ...