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Atomic model introduced by Niels Bohr in 1913
In atomic physics, the Bohr model or Rutherford–Bohr model is an obsolete model of the atom that incorporated some early quantum concepts. Developed from
Bohr_model
Danish physicist (1885–1962)
was also a philosopher and a promoter of scientific research. Bohr developed the Bohr model of the atom, in which he proposed that energy levels of electrons
Niels_Bohr
Extension of the Bohr model
The Bohr–Sommerfeld model (also known as the Sommerfeld model or Bohr–Sommerfeld theory) was an extension of the Bohr model to allow elliptical orbits
Bohr–Sommerfeld_model
Unit of length about the size of a hydrogen atom
is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.29177210544(82)×10−11 m. The name "bohr" was also suggested for
Bohr_radius
1911 theoretical description of an atom
propose a model for the atom. Niels Bohr joined Rutherford's lab and developed a theory for the electron motion which became known as the Bohr model. Throughout
Rutherford_model
Predecessor to modern quantum mechanics (1900–1925)
Arnold Sommerfeld's enhancements to the Bohr model of the atom. The main tool of the old quantum theory was the Bohr–Sommerfeld quantization condition, a
Old_quantum_theory
Function describing an electron in an atom
wavelength, which appeared in hindsight a dozen years after the Bohr model was proposed. The Bohr model was able to explain the emission and absorption spectra
Atomic_orbital
Smallest unit of a chemical element
Atomic Nucleus and Bohr's Early Model of the Atom". NASA/Goddard Space Flight Center. Archived from the original on 20 August 2007. Bohr, Niels (11 December
Atom
that Bohr's model would also need to overcome. When Bohr learned from a friend about Balmer's compact formula for the spectral line data, Bohr quickly
History_of_atomic_theory
Unit of magnetic moment
In atomic physics, the Bohr magneton (symbol μB) is a physical constant and the natural unit for expressing the magnetic moment of an electron caused by
Bohr_magneton
Number of protons found in the nucleus of an atom
Bohr who was at the same lab (and who had used Van den Broek's hypothesis in his Bohr model of the atom), decided to test Van den Broek's and Bohr's hypothesis
Atomic_number
Physical constants of energy and wavenumber
spectral series, but Niels Bohr later showed that its value could be calculated from more fundamental constants according to his model of the atom. Before the
Rydberg_constant
did not gain a theoretical underpinning until the Bohr model was introduced. Not only did the Bohr model explain the reasons for the structure of the Rydberg
History_of_quantum_mechanics
Principal energy levels in atomic physics
In 1913, Niels Bohr proposed a model of the atom, giving the arrangement of electrons in their sequential orbits. At that time, Bohr allowed the capacity
Electron_shell
System of measurement
this system is the radius of the first Bohr orbit and their velocity is the electron velocity in Bohr's model of the first orbit. In 1959, Shull and Hall
Atomic_units
Field of physics that studies the atom
no such rules for excitation by collision processes. The Bohr model, proposed by Niels Bohr in 1913, is a revolutionary theory describing the structure
Atomic_physics
Dimensionless number that quantifies the strength of the electromagnetic interaction
named by Arnold Sommerfeld, who introduced it in 1916 when extending the Bohr model of the atom. α {\displaystyle \alpha } quantified the gap in the fine
Fine-structure_constant
1914 confirmation of the atom's quantum nature
proved to be consistent with the Bohr model for atoms that had been proposed the previous year by Niels Bohr. The Bohr model was a precursor of quantum mechanics
Franck–Hertz_experiment
Description of a quantum-mechanical system
discrete energy levels, and de Broglie reproduced the Bohr model formula for the energy levels. The Bohr model was based on the assumed quantization of angular
Schrödinger_equation
Important atomic emission spectra
electron, each with its own energy. These states were visualized by the Bohr model of the hydrogen atom as being distinct orbits around the nucleus. Each
Hydrogen_spectral_series
Physical constant in quantum mechanics
the development of Niels Bohr 's atomic model and Bohr quoted him in his 1913 paper of the Bohr model of the atom. Bohr's model went beyond Planck's abstract
Planck_constant
Formula for spectral line wavelengths in alkali metals
through the semi-classical Bohr model and through fully quantum-mechanical treatments of the hydrogen atom. In the Bohr model, electrons occupy quantized
Rydberg_formula
Process involving electrons
and the atom would cease to exist. This model is clearly wrong. In 1913, Niels Bohr refined the Rutherford model by stating that the electrons existed in
Photoinduced charge separation
Photoinduced_charge_separation
Danish chemist (1879–1958)
not rotate. This phenomenon was mentioned by Niels Bohr as contributing greatly to his 1913 model of the atom because it provided agreement with specific
Niels_Bjerrum
1925 physics article by Werner Heisenberg
ISBN 978-0-19-888390-6. Kragh, Helge (2012-05-03). Niels Bohr and the Quantum Atom: The Bohr Model of Atomic Structure 1913-1925. OUP Oxford. ISBN 978-0-19-163046-0
Umdeutung_paper
New Zealand physicist and chemist (1871–1937)
Geiger and Ernest Marsden. In 1912, he invited Niels Bohr to join his lab, leading to the Bohr model of the atom. In 1917, he performed the first artificially
Ernest_Rutherford
First modern model of the atom
Rutherford's model, made progress towards understanding atomic spectra. That would have to wait until Niels Bohr built the first quantum-based atom model. Thomson's
Plum_pudding_model
Number assigned to each electron shell in an atom
semiclassical Bohr model of the atom, distinguishing between different energy levels. With the development of modern quantum mechanics, the simple Bohr model was
Principal_quantum_number
Atom of the element hydrogen
shortcomings were resolved by Arnold Sommerfeld's modification of the Bohr model. Sommerfeld introduced two additional degrees of freedom, allowing an
Hydrogen_atom
Physics principle formulated by Niels Bohr
classical prediction (valid for large wavelength). Niels Bohr used a similar idea, while developing his model of the atom. In 1913, he provided the first postulates
Correspondence_principle
In addition to the model of the atom, Niels Bohr also proposed a model of the chemical bond. He proposed this model first in the article "Systems containing
Bohr model of the chemical bond
Bohr_model_of_the_chemical_bond
Danish physicist (1922–2009)
connection". His father was Niels Bohr. Starting from Rainwater's concept of an irregular-shaped liquid drop model of the nucleus, Bohr and Mottelson developed
Aage_Bohr
Model of subatomic particles
of all the new information, of which the 1913 model of Niels Bohr came to predominate. The Bohr model proposed electrons in circular orbit around the
Toroidal_ring_model
Japanese physicist (1865–1950)
Nagaoka himself abandoned his proposed model in 1908. Rutherford and Niels Bohr would present the more viable Bohr model in 1913. Nagaoka later did research
Hantaro_Nagaoka
Periodic table of the elements with eight or more periods
nucleus, which is predicted to push the limit further to Z ≈ 173. The Bohr model exhibits difficulty for atoms with atomic number greater than 137, for
Extended_periodic_table
Details in the emission spectrum of an atom
explanation was first given by Niels Bohr in 1914, who suggested that the orbits of electrons in his Bohr model of the atom precessed due to relativistic
Fine_structure
Model of electrical conduction
the Drude model was inaccurate for all galvanomagnetic phenomena. The same year Niels Bohr also showed in his thesis that (according to Bohr–Van Leeuwen
Drude_model
Quantum mechanical property
about a nucleus is a prime example of quantum orbital motion. While the Bohr model describes the electron's motion as uniform circular motion, analogous
Orbital_motion_(quantum)
Universal symbol of Atheism
Atomic Model Observations and Limitations In Detail". BYJUS. Retrieved 2025-01-17. Kragh, Helge (17 May 2012). Niels Bohr and the Quantum Atom: The Bohr Model
Atomic_whirl
Deep-red spectral line of hydrogen
atmosphere, including solar prominences and the chromosphere. According to the Bohr model of the atom, electrons exist in quantized energy levels surrounding the
Hydrogen-alpha
Experiments proving existence of atomic nuclei
initiated the development of the planetary Rutherford model of the atom and eventually the Bohr model. Rutherford scattering is now exploited by the materials
Rutherford scattering experiments
Rutherford_scattering_experiments
Interpretation of quantum mechanics
from the work of Niels Bohr, Werner Heisenberg, Max Born, and others. While the name "Copenhagen" refers to the city where Bohr and Heisenberg worked,
Copenhagen_interpretation
Deliberately simplistic scientific model
universe, a simple expanding universe model; the Bohr model of the atom, a "semi-classical" quantum mechanical model of the atom, which can be solved exactly
Toy_model
Scientific background leading to the discovery of subatomic particles
group, he developed the Bohr model for electrons orbiting the nucleus in 1913. The Bohr model eventually led to an atomic model based on quantum mechanics
Discovery_of_the_neutron
Process of drawing correct inferences
science, analogies are often used in models to understand complex phenomena in a simple way. For example, the Bohr model explains the interactions of sub-atomic
Logical_reasoning
Atoms with a single valence electron, so they behave like hydrogen
quantization of angular momentum closely parallels that proposed by Niels Bohr (see Bohr model) in 1913, with no knowledge of wavefunctions. In a real atom, the
Hydrogen-like_atom
This topic describes the inventions and discoveries of people of danish origin
proposed by Hans Christian Ørsted. Bohr model — developed by Niels Bohr. Bohr–Van Leeuwen theorem — proposed by Niels Bohr, it states that when statistical
List of Danish inventions and discoveries
List_of_Danish_inventions_and_discoveries
Description of physical properties at the atomic and subatomic scale
can eject electrons from the material. Niels Bohr then developed Planck's ideas about radiation into a model of the hydrogen atom that successfully predicted
Quantum_mechanics
Gives the total power radiated by an accelerating, nonrelativistic point charge
implication is that an electron orbiting around a nucleus, as in the Bohr model, should lose energy, fall to the nucleus and the atom should collapse
Larmor_formula
Energy–frequency relation in quantum mechanics
Cohen-Tannoudji, Diu & Laloë (1973/1977), p. 27. Flowers et al. (n.d), 6.2 The Bohr Model van der Waerden (1967), p. 5. Cohen-Tannoudji, C., Diu, B., Laloë, F.
Planck_relation
1913 model of abrupt transitions of quantum systems
to a lower energy level. The concept was introduced by Niels Bohr, in his 1913 Bohr model. A quantum jump is a phenomenon that is peculiar to quantum systems
Quantum_jump
Relationship inferred from observation
the Lyman series, but lacked a theoretical basis until Niels Bohr produced his Bohr model of the atom in 1925. On occasion, what was thought to be an empirical
Empirical_relationship
Hydrogen spectral series
with a neutral helium line seen in hot stars. Astronomical spectroscopy Bohr model Hydrogen spectral series Lyman series Rydberg formula Balmer jump Stellar
Balmer_series
Set of ultraviolet wavelengths emitted by hydrogen
1914, when Niels Bohr produced his Bohr model theory, the reason why hydrogen spectral lines fit Rydberg's formula was explained. Bohr found that the electron
Lyman_series
Theories of quantum chemistry explained via relativistic mechanics
relativistic correction for the Bohr model). Bohr calculated that a 1s orbital electron of a hydrogen atom orbiting at the Bohr radius of 0.0529 nm travels
Relativistic quantum chemistry
Relativistic_quantum_chemistry
Mode of arrangement of electrons in different shells of an atom
semiconductors. Electron configuration was first conceived under the Bohr model of the atom, and it is still common to speak of shells and subshells despite
Electron_configuration
Quantum number denoting orbital angular momentum
quantum number was carried over from the Bohr model of the atom, and was posited by Arnold Sommerfeld. The Bohr model was derived from spectroscopic analysis
Azimuthal_quantum_number
Study of matter-light interactions at small scales
Bohr model to Hydrogen, and numerous other reasons, lead to an entirely new mathematical model of matter and light: quantum mechanics. Early models to
Atomic, molecular, and optical physics
Atomic,_molecular,_and_optical_physics
Energy needed to remove an electron
hydrogen atom ( Z = 1 {\displaystyle Z=1} ) can be evaluated in the Bohr model, which predicts that the atomic energy level n {\displaystyle n} has energy
Ionization_energy
Notation for conserved quantities in physics and chemistry
integer steps. The model of the atom, first proposed by Niels Bohr in 1913, relied on a single quantum number. Together with Bohr's constraint that radiation
Quantum_number
Chemical element with atomic number 1 (H)
Niels Bohr: The Atomic Model. Great Scientific Minds. ISBN 978-1-4298-0723-4. Stern, D. P. (16 May 2005). "The Atomic Nucleus and Bohr's Early Model of the
Hydrogen
Niels Bohr, a Danish physicist, introduced the concepts of quantum mechanics to atomic structure by proposing what is now known as the Bohr model of the
History_of_chemistry
eponym of the topics listed below. Bohr magneton Bohr model Bohr model of the chemical bond Bohr orbital Bohr radius Bohr's frequency condition Bohrium, the
List of things named after Niels Bohr
List_of_things_named_after_Niels_Bohr
Obsolete theories in natural history and natural philosophy
Bohr model with quantized orbits Electron cloud model following the development of quantum mechanics in 1925 and the eventual atomic orbital models derived
List of superseded scientific theories
List_of_superseded_scientific_theories
Topics referred to by the same term
moment proposed by Niels Bohr Bohr model, an atomic theory due to Niels Bohr Bohr radius, a radius of atomic orbit in Bohr model Bohrium, a chemical element
Bohr_(disambiguation)
Teaching a complex subject via simpler models
lie-to-children is found in physics and chemistry, where the Bohr model (one type of planetary model) of atomic electron shells is still often used to introduce
Lie-to-children
Excited atomic quantum state with high principal quantum number (n)
by the electron in a hydrogen atom. In spite of its shortcomings, the Bohr model of the atom is useful in explaining these properties. Classically, an
Rydberg_atom
German–British physicist (1882–1970)
energy values of the hydrogen atom and found that they agreed with the Bohr model. Another important contribution was made by Erwin Schrödinger, who looked
Max_Born
Physical phenomenon
Two views of the Auger process using the Bohr model of the atom. (a) illustrates sequentially the steps involved in Auger deexcitation. An incident electron
Auger_effect
Natural number
largest element on the periodic table allowed for a point nucleus by the Bohr model and the Dirac equation. "There is a most profound and beautiful question
137_(number)
Chemical element with atomic number 2 (He)
Thayer. "The Old Quantum Physics of Niels Bohr and the Spectrum of Helium: A Modified Version of the Bohr Model". San Jose State University. Archived from
Helium
Theoretical framework in physics
field, also exists in the form of particles. In 1913, Niels Bohr introduced the Bohr model of atomic structure, wherein electrons within atoms can only
Quantum_field_theory
Hypothetical type of nuclear reaction
the other paths. This result is consistent with the predictions of the Bohr model. If 1 watt (6.242 × 1018 eV/s) were produced from ~2.2575 × 1011 deuteron
Cold_fusion
Watchmen character
Manhattan's forehead is marked with the atomic structure (specifically the Bohr model) of hydrogen, which he put on himself, declining a helmet with the atom
Doctor_Manhattan
Formulation of quantum mechanics
formulation of quantum mechanics. Its account of quantum jumps supplanted the Bohr model's electron orbits. It did so by interpreting the physical properties of
Matrix_mechanics
French physicist (1889–1969)
University of Paris and it was in this year that Niels Bohr submitted his first paper on the Bohr model of the hydrogen atom. From 1914 until 1919, during
Léon_Brillouin
Austrian physicist
involving quantization of electronic orbitals, thus anticipating the Bohr model (1913) by three years. Haas's paper, however, was initially rejected and
Arthur_Erich_Haas
Problem in physics and astronomy
the Einstein–Brillouin–Keller method, which is also the basis of the Bohr model of atomic hydrogen. More recently, as explained further in the quantum-mechanical
Euler's_three-body_problem
Law concerning X-rays emitted by atoms
against the atomic number. This formula can be explained based on the Bohr model of the atom, namely, E = h ν = E i − E f = m e q e 2 q Z 2 8 h 2 ε 0 2
Moseley's_law
Elementary particle with negative charge
accurately explained the spectral lines of the hydrogen atom. However, Bohr's model failed to account for the relative intensities of the spectral lines
Electron
German physicist and mathematician (1824–1887)
discrete spectral lines were not explained as electron transitions until the Bohr model of the atom in 1913, which helped lead to quantum mechanics. It was Kirchhoff's
Gustav_Kirchhoff
British chemist and physicist (1766–1844)
A New System of Chemical Philosophy (1808) presented a coherent atomic model, supplied relative atomic weights and symbolic notation, and established
John_Dalton
Lowest possible energy of a quantum system or field
was derived from quantum mechanics. In 1913 Niels Bohr had proposed what is now called the Bohr model of the atom, but despite this it remained a mystery
Zero-point_energy
German–American physicist (1882–1964)
included the Franck–Hertz experiment, an important confirmation of the Bohr model of the atom. He promoted the careers of women in physics, notably Lise
James_Franck
Association of atoms to form chemical compounds
their bonding models on that of Abegg's rule (1904). Niels Bohr also proposed a model of the chemical bond in 1913. According to his model for a diatomic
Chemical_bond
1938 achievement in physics
the uranium-235 isotope in that of uranium. Niels Bohr and John Wheeler reworked the liquid drop model to explain the mechanism of fission. In the last
Discovery_of_nuclear_fission
Unintuitive aspects of quantum mechanics
mechanics of classical physics. Early 20th-century models of atomic physics, such as the Rutherford–Bohr model, represented subatomic particles as little balls
Quantum_weirdness
quantum physicist Niels Bohr c. 1913. The idea of the fixed orbit is considered a major component of the Bohr model (or Bohr theory). "Student Years,
Fixed_orbit
Branch of physics
deriving the model from deeper principles. It is a bit like fitting a curve to data points before you understand what the curve means. The Bohr model of the
Theoretical_physics
Effect of CO₂ on the oxygen binding affinity of hemoglobin
The Bohr effect is a phenomenon first described in 1904 by the Danish physiologist Christian Bohr (who was also the father of the physicist and Nobel
Bohr_effect
Change of an electron between energy levels within an atom
final state, the shorter the photons' wavelength. Danish physicist Niels Bohr first theorized that electrons can perform quantum jumps in 1913. Soon after
Atomic_electron_transition
1922 physical experiment demonstrating that atomic spin is quantized
S2CID 225215678. Kragh, Helge (2012). "The Bohr–Sommerfeld theory". Niels Bohr and the quantum atom: The Bohr model of atomic structure 1913–1925. Oxford University
Stern–Gerlach_experiment
Notation in quantum physics
expressed as the difference of two terms. This was later summarized by the Bohr model, which identified the terms with quantized energy levels, and the spectral
Term_symbol
Reaction that splits an atomic nucleus
electrons (the Rutherford model). Niels Bohr improved upon this in 1913 by reconciling the quantum behavior of electrons (the Bohr model). In 1928, George Gamow
Nuclear_fission
Mathematical structures that allow quantum mechanics to be explained
theoretical physics of the time. Bohr and Sommerfeld went on to modify classical mechanics in an attempt to deduce the Bohr model from first principles. They
Mathematical formulation of quantum mechanics
Mathematical_formulation_of_quantum_mechanics
Topics referred to by the same term
led to the development of the Rutherford model (or planetary model) of the atom and eventually to the Bohr model Rutherford (lunar crater), a small impact
Rutherford
Units of measurement based on universal physical constants
chemistry, especially the hydrogen atom. For example, in atomic units, in the Bohr model of the hydrogen atom an electron in the ground state has orbital radius
Natural_units
Spectral line splitting in electrical field
(linear) Stark effect in hydrogen is in agreement with both the old Bohr–Sommerfeld model and the quantum-mechanical theory of the atom, higher-order corrections
Stark_effect
Elementary particle or quantum of light
Accordingly, Bohr and his co-workers gave their model "as honorable a funeral as possible". Nevertheless, the failures of the BKS model inspired Werner
Photon
Topics referred to by the same term
Bohr's law may refer to: Bohr model Bohr effect Bohr equation Gunslinger effect This disambiguation page lists articles associated with the title Bohr's
Bohr's_law_(disambiguation)
BOHR MODEL
BOHR MODEL
Boy/Male
Indian, Marathi
Early Morning; Dawn
Surname or Lastname
English
English : from Old English bÄr ‘boar’, hence probably a nickname for a keen hunter of wild boar or for someone thought to resemble the animal in some way.Variant spelling of Boer.
Boy/Male
British, Dutch, English
Boar Hardness; Brave Boar
Boy/Male
Muslim
Wave
Male
Hungarian
Hungarian form of Greek GabriÄ“l, GÃBOR means "man of God" or "warrior of God."
Boy/Male
Arabic, Muslim
Wave
Boy/Male
Norse
Father of Odin.
Boy/Male
German
Boar Hard; Strong as a Boar
Girl/Female
Indian
Boar.
Boy/Male
African
Rock.
Girl/Female
Australian
Fun
Boy/Male
Swedish
Youth.
Boy/Male
American, Anglo, British, English
Wild Boar; Born in April; Boar-warrior; Boar Battle
Boy/Male
Anglo Saxon
Boar.
Boy/Male
Welsh
Boar.
Boy/Male
American, Anglo, British, English
Wild Boar; Boar-warrior
Boy/Male
Welsh
Boar.
Boy/Male
Arabic
Sea; Ocean
Boy/Male
British, English, Welsh
Boar
Boy/Male
British, Danish, Dutch, English, German, Swedish
Boar Hardness; Strong as a Boar; Brave Boar
BOHR MODEL
BOHR MODEL
Boy/Male
Arabic, Muslim
Nobility; Good Manners
Surname or Lastname
English
English : patronymic from the personal name Tomlin.
Girl/Female
Tamil
True beauty and kindness. a lover of good. genuine and caring
Boy/Male
English
Strong; gifted ruler. Blend of Jer- and Derrick.
Girl/Female
Australian, Danish, Finnish, French, German, Greek, Italian, Swedish
Mountain of the God; From Mount Olympus; Home of the Gods; Heavenly
Boy/Male
Tamil
Wining in a good way
Boy/Male
Australian, French, Greek
Manly Beauty; The God of Medicine and Healing
Boy/Male
American, Australian, British, Chinese, English, Jamaican, Teutonic
Proud; Firebrand; Sword
Boy/Male
Irish Gaelic
Bright.
Girl/Female
African, American, Australian, British, Christian, Danish, English, French, German, Latin, Swedish, Welsh
Lame; Disabled; Princess; Small Sword; Limping; Country; Ruler; Gladiolus Flower
BOHR MODEL
BOHR MODEL
BOHR MODEL
BOHR MODEL
BOHR MODEL
n.
A boar.
n.
See Mohr.
n.
A rough, surly, ill-bred man; a boor.
n.
A West African gazelle (Gazella mohr), having horns on which are eleven or twelve very prominent rings. It is one of the species which produce bezoar.
n.
A chamber or a cottage.
n.
A young wild boar.
n.
A Dutch, German, or Russian peasant; esp. a Dutch colonist in South Africa, Guiana, etc.: a boer.
n.
The flesh of a boar; also, the salted and prepared flesh of a boar.
n.
A colonist or farmer in South Africa of Dutch descent.
n.
A baseborn or clownish person; a boor.
n.
Boar hunting; -- so called by Anglo-Indians.
n.
A boor killed for the table.
n.
Any kind of boor or low-lived person.
n.
The uncastrated male of swine; specifically, the wild hog.
n.
A rude ill-bred person; one who is clownish in manners.
n.
A churl; a boor; a peasant or countryman.
v. t.
A tusk of a wild boar.
n.
A husbandman; a peasant; a rustic; esp. a clownish or unrefined countryman.
n.
A young boar of the second year.
a.
Like a boor; clownish; uncultured; unmannerly.