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प्रश्न
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उत्तर
- The spectral lines of this series corresponds to the transition of an electron from a higher energy state to the 4th orbit.
For this series, p = 4 and n = 5, 6, 7, .... - The wave numbers and the wavelengths of the spectral lines constituting the Bracket series are given by
`barv = 1/lambda = R(1/4^2 - 1/n^2)`
These series lie in the near infrared region of the spectrum.
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संबंधित प्रश्न
Answer in brief.
State the postulates of Bohr’s atomic model.
Derive the expression for the energy of an electron in the atom.
Answer in one sentence:
Name the element that shows the simplest emission spectrum.
What is the energy of an electron in a hydrogen atom for n = ∞?
Starting with 𝑟 = `(ε_0h^2n^2)/(pimZe^2),` Show that the speed of an electron in nth orbit varies inversely to principal quantum number.
Using de Broglie’s hypothesis, obtain the mathematical form of Bohr’s second postulate.
Calculate the wavelength for the first three lines in the Paschen series.
(Given RH =1.097 ×107 m-1)
State the postulates of Bohr’s atomic model. Hence show the energy of electrons varies inversely to the square of the principal quantum number.
How the linear velocity 'v' of an electron in the Bohr orbit is related to its quantum number 'n'?
The ratio of speed of an electron in the ground state in the Bohr's first orbit of hydrogen atom to velocity of light (c) is ____________.
(h = Planck's constant, ε0 = permittivity of free space, e = charge on electron)
Using Bohr's model, the orbital period of electron in hydrogen atom in nth orbit is (ε0 = permittivity of free space, h = Planck's constant, m = mass of electron and e = electronic charge)
Bohr model is applied to a particle of mass 'm' and charge 'q' is moving in a plane under the influence of a transverse magnetic field 'B. The energy of the charged particle in the nth level will be (h = Planck's constant).
When the electron in hydrogen atom jumps from fourth Bohr orbit to second Bohr orbit, one gets the ______.
What is the de Broglie wavelength of an electron of energy 180 eV?
(Mass of electron = 9 x 10-31 kg and Planck's constant = 6.6 x 10-34 Js.)
In Bohr's model of hydrogen atom, the period of revolution of the electron in any orbit is proportional to ______.
In the nth orbit, the energy of an electron `"E"_"n"= -13.6/"n"^2"eV"` for hydrogen atom. The energy required to take the electron from first orbit to second orbit will be ____________.
When hydrogen atom is in its first excited level, its radius is how many time its ground state radius?
For an electron, discrete energy levels are characterised by ____________.
Angular speed of an electron in the ground state of hydrogen atom is 4 × 1016 rad/s. What is its angular speed in 4th orbit?
The minimum energy required to excite a hydrogen atom from its ground state is ____________.
An electron makes a transition from an excited state to the ground state of a hydrogen like atom. Out of the following statements which one is correct?
When an electron in a hydrogen atom jumps from the third orbit to the second orbit, it emits a photon of wavelength 'λ'. When it jumps from the fourth orbit to third orbit, the wavelength emitted by the photon will be ______.
What is the mathematical formula for the third postulate of Bohr's atomic model?
When an electron in hydrogen atom revolves in stationary orbit, it ______.
The speed of an electron in ground state energy level is 2.6 × 106 ms-1, then its speed in third excited state will be ______.
In Bohr’s atomic model, speed and time period of revolution of an electron in n = 3 level are respectively.
What is the origin of spectral lines? Obtain an expression for the wave number of a line in hydrogen spectrum.
Compute the shortest and the longest wavelength in the Lyman series of hydrogen atom.
The radius of the first Bohr orbit in the hydrogen atom is 0.5315 Å. The radius of the second Bohr orbit in the hydrogen atom is ______.
