Stars are made of plasma, so plasma is the most abundant form of matter in the universe. Removing electrons from atoms (usually in a gas) to produce a plasma is called "ionization
The negatively charged electrons are attracted to the positively charged nucleus.When temperatures get Really hot, the electrons can escape out of their orbit around the atom's nucleus. When the electron(s) leave, that leaves behind what scientists call a positively charged ion.when electrons are no longer trapped in orbits around the nucleus, we have the plasma state. This is when a gas becomes a bunch of electrons which have escaped the pull of the nucleus and ions which are positively charged because they have lost one or more electrons.