What is the difference between ionized gas and plasma?

Ionized gas and plasma are often used interchangeably, but there is a subtle difference between the two. Ionized gas refers to a gas in which some of the atoms or molecules have lost or gained electrons, resulting in charged particles. Plasma, on the other hand, specifically refers to a state of matter in which a significant portion of the particles are ionized, leading to unique properties such as conductivity and the ability to respond to electromagnetic fields. In essence, all plasmas are ionized gases, but not all ionized gases are considered plasmas.