Advertisements
Advertisements
प्रश्न
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
For the hydrogen atom, the minimum excitation energy ( of n =2) is ______
The speed of electron having de Broglie wavelength of 10 -10 m is ______
(me = 9.1 × 10-31 kg, h = 6.63 × 10-34 J-s)
State Bohr's second postulate for the atomic model. Express it in its mathematical form.
Derive an expression for the radius of the nth Bohr orbit for the hydrogen atom.
Calculate the shortest wavelength in the Paschen series if the longest wavelength in the Balmar series is 6563 Ao.
State the postulates of Bohr’s atomic model. Hence show the energy of electrons varies inversely to the square of the principal quantum number.
Obtain an expression for wavenumber, when an electron jumps from a higher energy orbit to a lower energy orbit. Hence show that the shortest wavelength for the Balmar series is 4/RH.
How the linear velocity 'v' of an electron in the Bohr orbit is related to its quantum number 'n'?
The magnifying power of a telescope is high, if its objective and eyepiece have respectively ____________.
For a certain atom when the system moves from 2E level to E, a photon of wavelength `lambda` is emitted. The wavelength of photon produced during its transition from `(4"E")/3` level to E is ____________.
How many moles of electrons are required for reduction of 9 moles of Cr3+ to Cr?
If the ionisation potential of helium atom is 24.6 volt, the energy required to ionise it will be ____________.
For which one of the following, Bohr model is not valid?
The binding energy of an electron in nth orbit of the hydrogen atom is given by `"E"_"n" = 13.6/"n"^2 "eV."` The energy required to knock an electron from the second orbit in eV will be ____________.
In hydrogen spectnun, the wavelengths of light emited in a series of spectral lines is given by the equation `1/lambda = "R"(1/3^2 - 1/"n"^2)`, where n = 4, 5, 6 .... And 'R' is Rydberg's constant.
Identify the series and wavelenth region.
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 de-Broglie wavelength of an electron in 4th orbit is ______.
(r = radius of 1st orbit)
The third line of the Balmer series, in the emission spectrum of the hydrogen atom, is due to the transition from the ______.
The momentum of an electron revolving in nth orbit is given by ______.
The value of Rydberg constant in joule is ______.
Let Ee and Ep represent the kinetic energy of electron and photon, respectively. If the de-Broglie wavelength λp of a photon is twice the de-Broglie wavelength λe of an electron, then `E_p/E_e` is ______.
(speed of electron = `c/100`, c = velocity of light)
Calculate the energy of the electron in the ground state of the hydrogen atom. Express it in joule and in eV.
Find the momentum of the electron having de Broglie wavelength of 0.5 A.
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 ______.
