Final answer:
Plasma is a state of matter characterized by ionized particles, no definite shape or volume, and good electrical conductivity.
Step-by-step explanation:
The state of matter that is characterized by ionized particles, no definite shape or volume, and good electrical conductivity is plasma. Plasma is often referred to as the fourth state of matter and is created when a gas is heated to very high temperatures or subjected to a strong electromagnetic field.
Learn more about Plasma as a state of matter