Sulfide - Nomenclature. 1  The systematic names sulfanediide and sulfide (2â), valid IUPAC names, are determined according to the substitutive and additive nomenclatures, respectively.
Nuclear proliferation is the spread of nuclear weapons, fissionable material, and weapons-applicable nuclear technology and information to nations not recognized as Nuclear Weapon States by the Treaty on the Non-Proliferation of Nuclear Weapons, also known as the Nuclear Non-Proliferation Treaty or NPT.
The most crucial treaty dealing with the issue of nuclear weapons proliferation, the Nuclear Non-Proliferation Treaty (NPT), came into force on March 5, 1970. Noting that the trend of horizontal proliferation would inevitably continue, the United States and Soviet Union collaborated to prevent such an outcome. This treaty identified the United States, Soviet Union, United Kingdom, and France as nuclear weapons states.