Today eight countries are possessing nuclear weapons. The five nuclear weapons states United States, Russia (former Soviet Union), United Kingdom, France and China, are the only countries allowed to have nuclear weapons according to the Non-Proliferation Treaty (NPT) from 1970.All members of the United Nations except Israel, India and Pakistan have signed the NPT.he five nuclear weapons states United States, Russia (former Soviet Union), United Kingdom, France and China, are the only countries allowed to have nuclear weapons according to the Non-Proliferation Treaty (NPT) from 1970. All members of the United Nations except Israel, India and Pakistan have signed the NPT.
User: The most common form of matter in the universe is _____. plasma gas liquid solid. Weegy: The most common form of matter in the universe is PLASMA. User: The state of matter with a specific volume but no definite shape is the _____ state. plasma gas liquid solid. Log in to see more information.
Hydrogen is the simplest and most abundant of elements. Composed of one proton and one electron, it makes up 90% of our universe (by number of atoms). Hydrogen, the most common element in the universe, is normally an insulating gas, but at high pressures it may turn into a superconductor.