Plasma is the fourth state of matter. It’s an electrically charged gas; a mix of positively charged ions and negatively charged electrons.
Plasma makes up the sun and stars, and it is the most common state of matter in the universe. Plasma behaves like a gas, but also conducts electricity like a wire, because it is ionized. The nucleus and the electrons of an atom are equally and oppositely charged, so overall, an atom is electrically neutral. However, if we remove one of the orbiting electrons, there is an imbalance, and the atom is now electrically charged and called an ion.
Cold Plasma (Non-Thermal Plasma)
A cold plasma is one in which the thermal motion of the ions can be ignored. Consequently there is no pressure force, the magnetic force can be ignored, and only the electric force is considered to act on the particles.
