gas
The state in which matter has the most energy is plasma. Plasma is a state of matter where the particles, such as electrons and protons, have enough energy to break free from their atoms, resulting in a highly energized and electrically charged state.
gas
solid
Gas.
Gases
The most common type of energy/mass in the Universe is in the form of dark energy, followed by dark matter. Only about 4% of the Universe is in the form of "normal" (baryonic) matter. If it is specifically to this matter you refer: the most common state of matter is plasma, found in stars.
Plasma has the most energy stored as interaction energy compared to solid, liquid, and gas states of matter. Plasma is a state of matter in which atoms are ionized and the electrons are detached from the nucleus, leading to high energy levels due to strong interactions between charged particles.
Water as steam in the gas state has the most energy compared to water in the liquid or solid state.
The gas state has the most energy out of all three states because of how freely the molecules are moving, and able to move.
Plasma's are the most energetic states we have discovered but the answer you are probably looking for is when the matter is in a gaseous state, that is when the atoms have dissociated from each other almost completely. But in plasma the particles that make up an atom have dissociated.
Light is NOT a state of matter - its photons, pure energy.
Gas is actually the least dense state of matter. In a gas, particles are spread out and have high energy causing them to move rapidly and take up a large volume. Solids are the most dense state because their particles are tightly packed together.