मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

For the hydrogen atom, the minimum excitation energy ( of n =2) is ______ - Physics

Advertisements
Advertisements

प्रश्न

For the hydrogen atom, the minimum excitation energy ( of n =2) is ______

पर्याय

  • 3.4 e V

  • 10.2 eV

  • 13.6 eV

  • – 10.2 eV

MCQ
रिकाम्या जागा भरा
Advertisements

उत्तर

For the hydrogen atom, the minimum excitation energy ( of n =2) is 10.2 eV.

shaalaa.com
Bohr’s Atomic Model
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 15: Structure of Atoms and Nuclei - MCQ’S

APPEARS IN

संबंधित प्रश्‍न

According to Bohr's second postulate, the angular momentum of the electron is the integral multiple of `h/(2pi)`. The S.I unit of Plank constant h is the same as ______ 


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) 


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. 


Calculate the wavelength for the first three lines in the Paschen series. 
(Given RH =1.097 ×107 m-1)  


Which of the following series of transitions in the spectrum of hydrogen atom falls in ultraviolet region?


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)


With the increase in principal quantum number, the energy difference between the two successive energy levels ____________.


Which of the following statements about the Bohr model of the hydrogen atom is FALSE?


Taking the Bohr radius as a0= 53 pm, the radius of Li++ ion in its ground state, on the basis of Bohr's model, will be about ______.


For which one of the following, Bohr model is not valid?


In Bohr's model of hydrogen atom, the period of revolution of the electron in any orbit is proportional to ______.


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 ____________.


If m is mass of electron, v its velocity, r the radius of stationary circular orbit around a nucleus with charge Ze, then from Bohr's second postulate, the kinetic energy `"K.E." = 1/2"mv"^2` of the electron in C.G.S. system is 2 equal to ____________.


When an electron in hydrogen atom is excited from its 3rd to 5th stationary orbit, tbe change in angular momentum of electron is (Planck's constant: h = 6.62 x 10-34 Js) ____________.


The minimum energy required to excite a hydrogen atom from its ground state is ____________.


The de-Broglie wavelength of an electron in 4th orbit is ______.

(r = radius of 1st orbit)


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 ______.


The radius of orbit of an electron in hydrogen atom in its ground state is 5.3 x 10-11 m After collision with an electron, it is found to have a radius of 13.25 x 10-10 m. The principal quantum number n of the final state of the atom is ______.


The ground state energy of the hydrogen atom is -13.6 eV. The kinetic and potential energy of the electron in the second excited state is respectively ______ 


An electron of mass m and charge e initially at rest gets accelerated by a constant electric field E. The rate of change of de-Broglie wavelength of this electron at time t ignoring relativistic effects is ______.


Which of the following series of transition of hydrogen spectrum falls in visible region?


The triply ionised beryllium (Be+++) has the same electron orbital radius as that of the ground state of the hydrogen atom. The energy state (n) of triply ionised beryllium is ______.

(Z for beryllium = 4)


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 ______.


Ultraviolet light of wavelength 300 nm and intensity 1.0 Wm−2 falls on the surface of a photosensitive material. If one percent of the incident photons produce photoelectrons, then the number of photoelectrons emitted from an area of 1.0 cm2 of the surface is nearly ______.


Calculate the energy of the electron in the ground state of the hydrogen atom. Express it in joule and in eV.


Calculate the radius of the first Bohr orbit in the hydrogen atom.


Find the momentum of the electron having de Broglie wavelength of 0.5 A.


Show that the angular speed of an electron in the nth Bohr orbit is w = `(πme^4)/(2ε_0^2h^3n^3)` and the corresponding frequency of the revolution of the electron is f = `(me^4)/(4ε_0^2h^3n^3)`.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×