Bohrn.
/bɔː/, U.S. /bɔr/ Used to designate certain theories, measurements, etc., formulated by Bohr; as Bohr atom: the atom as described by the Bohr theory; Bohr('s) magneton: a unit arising from Bohr's theory of the atom, equal to eh/4πm (where e and m are the charge and mass of the electron, and h is Planck's constant, in S.I. units), i.e. about 9·27 × 10−24 joule per tesla; Bohr model: a model of the structure of the hydrogen atom; Bohr radius: the radius of the smallest electron orbit in the Bohr model; Bohr('s) theory: a theory of the structure of the hydrogen atom (and hence of other atoms).
ΘΚΠ
the world > matter > chemistry > chemistry as a science > chemical theories > [noun]
binary theory1863
material theory1863
type-theory1868
Bohr model1923
the world > matter > physics > atomic physics > [noun] > theory or law of
anomœomery1678
atomic theory1755
Dulong and Petit's law1863
Rutherford's formula1906
whole number rule1920
Bohr('s) theory1923
string theory1975
superstring theory1975
the world > matter > physics > atomic physics > [noun] > atomic structure > types of
Rutherford atom1913
Bohr atom1923
shell structure1955
Rydberg atom1971
the world > matter > physics > quantum theory > quantum mechanics > quantum electrodynamics > [noun] > multipole moment > unit of measurement of
magneton1911
Bohr('s) magneton1923
the world > matter > physics > quantum theory > [noun] > radius of smallest orbit
Bohr radius1956
1923 Kramers & Holst Atom & Bohr Theory of its Structure v. 119 The Bohr model of the hydrogen atom in the simplified form.
1923 Kramers & Holst Atom & Bohr Theory of its Structure v. 120 In the Bohr atom, likewise, the frequency of revolution w of the electron in its stationary orbit has no direct connection with the frequency of the radiation emitted when the electron passes from this orbit.
1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines iv. 212 The times of revolution in the Bohr circles are proportional to the cubes of the quantum numbers.
1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines iv. 249 We shall call the value (15) the Bohr magneton.
1927 N. V. Sidgwick Electronic Theory of Valency 208 The Bohr magneton..is almost exactly five (4·96) times the Weiss magneton.
1936 Nature 1 Feb. 187/2 The Bohr formula for the Rydberg constant is not correct.
1938 R. A. Houstoun Treat. Light (ed. 7) xviii. 335 Bohr's Theory of the Hydrogen Spectrum... Bohr supposed that the electron was circling round the proton, and that the centrifugal force was balanced by the electrostatic attraction.
1956 Nature 4 Feb. 241/2 R is the Bohr radius, 0·529 A.
1958 Chambers's Techn. Dict. 101/1 Bohr theory, a combination of the Rutherford conception of the atom as a central, positively-charged nucleus surrounded by planetary electrons, with the quantum theory, which restricts the permissible orbits in which the electrons can revolve.
1968 J. J. C. Smart Between Sci. & Philos. iii. 74 The Bohr theory of the atom may appeal to us because it somehow reduces the behavior of atoms to the more familiar behavior of the solar system.
This entry has not yet been fully updated (first published 1972; most recently modified version published online December 2021).
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