Were originally proposed by niels bohr?

Niels Bohr originally proposed the Bohr model of the atom in 1913, which introduced the idea of quantized energy levels for electrons orbiting the nucleus. This model was pivotal in explaining the spectral lines of hydrogen and laid the groundwork for modern quantum mechanics. Bohr's theories emphasized the dual wave-particle nature of electrons and introduced the concept of angular momentum quantization. His work significantly advanced our understanding of atomic structure.