What contributions by Niels Bohr are present in the modern atomic model and which are not?

Niels Bohr's contributions to the modern atomic model include the concept of quantized energy levels for electrons in an atom, which laid the groundwork for the development of quantum mechanics. His model introduced the idea of electron orbits and the quantization of angular momentum, helping to explain atomic spectra. However, aspects of his model, such as the fixed orbits of electrons, have been superseded by more advanced quantum mechanical models that describe electron behavior in terms of probabilities and wave functions, rather than defined paths.