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 element of all, and the lightest. It is also by far the most common element in the Universe. Over 90 percent of the atoms in the Universe are hydrogen. In its commonest form, the hydrogen atom is made of one proton, one electron, and no neutrons. Hydrogen is the only element that can exist without neutrons. Hydrogen is a colorless, odorless gas which exists, at standard temperature and pressure, as diatomic molecules, H2.