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  2. Bohr model - Wikipedia

    en.wikipedia.org/wiki/Bohr_model

    II:106 Although Bohr's model would also rely on just the electron to explain the spectrum, he did not assume an electrodynamical model for the atom. The other important advance in the understanding of atomic spectra was the Rydberg–Ritz combination principle which related atomic spectral line frequencies to differences between 'terms ...

  3. Bohr–Sommerfeld model - Wikipedia

    en.wikipedia.org/wiki/Bohr–Sommerfeld_model

    Calculations based on the Bohr–Sommerfeld model were able to accurately explain a number of more complex atomic spectral effects. For example, up to first-order perturbations, the Bohr model and quantum mechanics make the same predictions for the spectral line splitting in the Stark effect. At higher-order perturbations, however, the Bohr ...

  4. Electron configuration - Wikipedia

    en.wikipedia.org/wiki/Electron_configuration

    Electron configuration was first conceived under the Bohr model of the atom, and it is still common to speak of shells and subshells despite the advances in understanding of the quantum-mechanical nature of electrons. An electron shell is the set of allowed states that share the same principal quantum number, n, that electrons may occupy.

  5. Old quantum theory - Wikipedia

    en.wikipedia.org/wiki/Old_quantum_theory

    This model, which became known as the Bohr–Sommerfeld model, allowed the orbits of the electron to be ellipses instead of circles, and introduced the concept of quantum degeneracy. The theory would have correctly explained the Zeeman effect, except for the issue of electron spin. Sommerfeld's model was much closer to the modern quantum ...

  6. Bohr effect - Wikipedia

    en.wikipedia.org/wiki/Bohr_effect

    Christian Bohr, who was credited with the discovery of the effect in 1904. The Bohr effect is a phenomenon first described in 1904 by the Danish physiologist Christian Bohr. Hemoglobin's oxygen binding affinity (see oxygen–haemoglobin dissociation curve) is inversely related both to acidity and to the concentration of carbon dioxide. [1]

  7. Niels Bohr - Wikipedia

    en.wikipedia.org/wiki/Niels_Bohr

    The Bohr model worked well for hydrogen and ionized single-electron helium, which impressed Einstein [56] [57] but could not explain more complex elements. By 1919, Bohr was moving away from the idea that electrons orbited the nucleus and developed heuristics to describe them.

  8. How a whole-person care model is transforming autoimmune ...

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    Whole-person specialty care, a model where a comprehensive care team works together to coordinate personalized and individualized treatment, is offering renewed hope for patients.

  9. Quantum field theory - Wikipedia

    en.wikipedia.org/wiki/Quantum_field_theory

    In 1913, Niels Bohr introduced the Bohr model of atomic structure, wherein electrons within atoms can only take on a series of discrete, rather than continuous, energies. This is another example of quantization. The Bohr model successfully explained the discrete nature of atomic spectral lines.

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