I posted this question in an another forum but I didn't receive any answers, so I'll post it here again: Do all the fundamental particles in the Standard Model (61 fundamental particles) exhibit wave-particle duality? From my understanding, a photon acts more like a wave than it does a particle because it has a lower frequency, whereas an electron acts more like a particle than it does a wave because it has a much higher frequency. But both an electron and a photon show wave-particle duality. Another example for you to test my understanding is this: A photon that is a gamma ray behaves more like a particle than a wave because of its higher frequency, whereas a photon that is a radio wave behaves more like wave than a particle because of its lower frequency. Does this mean there is no such thing as "mass" per se, but that everything is a wave with a frequency with it? Would this apply to all the particles in the Standard Model?