What is the name of the atomic model in which electrons are treated as waves?

The atomic model where electrons are treated as waves is known as the Quantum Mechanical Model. This model arose from the development of quantum mechanics, which incorporates the principles of wave-particle duality, suggesting that particles like electrons exhibit both wave-like and particle-like properties.

In this framework, rather than defining electrons as simple particles moving in fixed orbits (as in the Bohr Model), the Quantum Mechanical Model uses complex mathematical equations (specifically, Schrödinger's wave equation) to derive probability distributions for where an electron is likely to be found. This leads to the concept of atomic orbitals, which represent regions of space around the nucleus where the probability of finding an electron is highest.

The Quantum Mechanical Model provides a more accurate depiction of atomic structure and behavior, particularly at the quantum level, compared to earlier models.