A plasma state It is a plasma. We call plasma the fourth state of matter, after the other three: liquid, solid and gaseous. It is actually an ionized gas. We have a stable and neutral gas and we provide energy to it, normally in the form of an electric discharge. What happens then is that part of the atoms of that gas “break”. The electrons at the outermost part of the atom gain enough energy to separate from the nucleus and move freely through the gas. That is an ionized gas, that is, a plasma or a plasmatic state.
