It's a gaslike state of matter consisting of positively charged ions, free electrons, and neutral particles. A hot, energetic phase of matter in which the atoms are broken apart into positive ions and negative electrons that move independently of each other. Plasma, like gases, have an indefinite shape and an indefinite volume. They are good conductors of electricity. It is the most common state of matter in the universe. Plasma is found in stars, the sun, the solar wind, lightening, and fire.