The state of matter in which particles are widely spaced and move freely with high kinetic energy is gas.
Gas is one of the four fundamental states of matter, along with solid, liquid, and plasma. In the gas state, the particles are not tightly packed together like in solids and liquids. Instead, they are widely spread apart and move around in random directions at high speeds.
The high kinetic energy of gas particles allows them to move freely and independently from one another. They are not constrained by any definite shape or volume, which means gases can expand to fill the entire container they are placed in.
Particles in a gas state have weak attractive forces between them, resulting in the lack of a fixed arrangement or structure. This makes gases highly compressible, meaning their volume can be reduced by applying pressure.
Examples of gases include oxygen, nitrogen, carbon dioxide, and helium. They exist in various forms in our everyday lives, from the air we breathe to the gases used in cooking, heating, and industrial processes.