who proposed a model with electrons moving in specific layers

Niels Bohr proposed the model in which electrons move in specific layers or shells around the nucleus. This model, introduced in 1913, suggested that electrons occupy fixed, quantized orbits or energy levels, and they can only gain or lose energy by jumping between these discrete orbits. Bohr's model improved upon Rutherford's atomic model by explaining atomic stability and the emission spectra of atoms through these quantized electron layers