If radio waves travel through earth's atmosphere as waves, how do they travel through empty space?

When radio waves reach a vacuum/ empty space, do they shoot out as some kind of particles/energy/electrons that then travel across space until they hit another medium and continue as a wave from there?

If not then how do they travel as a wave through space?

Radio waves are electromagnetic waves and like all other electromagnetic waves, they travel through vacuum or any medium as waves.

electromagnetic waves dont need a medium to propagate through. the electric and magnetic components of the wave propagates itself through any type of medium.

when it encounters a medium, you still get usual wavelike behavior, such as reflection, refraction and diffraction.

radio waves are electromagnetic waves.

the usual everyday waves that we encounter that aren't electromagnetic in nature are sound waves, deep sea waves, and seismic activity.

first and formost there is nothing called as an empy space. these waves have dual nature called wave-particle nature. in atmosphere travel as particle and without medium travel as wave.

Radio waves (electromagnetic waves) don't require any medium to propagate. So it can travel through space. IT IS A VARYING electrical and magnetic field.

They travel as radio magnetic waves not pressure waves.
Think about light as well.