Electron diffraction as evidence for the wave nature of electrons

Electron diffraction experiments can be performed using an electron gun, which accelerates electrons through a vacuum tube towards a crystal lattice, where they interact with the small gaps between atoms and form an interference pattern on a fluorescent screen behind the crystal.

The interference pattern created by the type of experiment described above, looks like a set of concentric rings as shown below:

If electrons only had a particle nature, you would expect the pattern to look like a single point, where the electron beam has passed through the lattice. However, this is not the case as the electrons undergo diffraction, which is something only waves can experience. This is why electron diffraction provides evidence for the wave nature of electrons.