What does electron scattering from a metallic surface suggest about electron behavior?

The observation of electron scattering from a metallic surface supports the wave behavior of electrons, as described by wave-particle duality in quantum mechanics. When electrons interact with the surface, they exhibit diffraction patterns similar to those produced by waves. This wave-like behavior is essential in understanding phenomena such as tunneling and the formation of electron bands in solids.

In experiments where electrons are directed at metallic surfaces, their scattering produces interference patterns that can only be explained adequately if electrons are treated as waves. This wave aspect is crucial in applications such as electron microscopy, where the resolution of images depends on the wave nature of electrons.

The other choices do not align with the observed phenomena: while electrons do exhibit particle-like behavior under certain conditions, the evidence from scattering phenomena emphasizes their wave characteristics. Furthermore, electrons interact significantly with surfaces rather than not interacting at all, and scattering occurs across a wide range of energies, not exclusively at low levels. Thus, the correct interpretation of electron scattering aligns with the understanding of electrons behaving as waves.