मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Would the Bohr formula for the H-atom remain unchanged if proton had a charge (+4/3)e and electron a charge (−3 /4)e, where e = 1.6 × 10–19C. Give reasons for your answer.

Advertisements
Advertisements

प्रश्न

Would the Bohr formula for the H-atom remain unchanged if proton had a charge (+4/3)e and electron a charge (−3/4)e, where e = 1.6 × 10–19C. Give reasons for your answer.

टीपा लिहा
Advertisements

उत्तर

According to Bohr, for an electron around a stationary nucleus, the electrostatic force of attraction provides the necessary centripetal force.

i.e. `1/(4πε_0) (q_1q_2)/r^2 = (mv^2)/r` ......(i)

Hence the magnitude of electrostatic force F ∞ qx q2

If the proton had a charge (+4/3)e and the electron a charge (−3/4)e, then the Bohr formula for the H-atom remains the same, since the Bohr formula involves only the product of the charges which remain constant for given values of charges.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 12: Atoms - Exercises [पृष्ठ ७८]

APPEARS IN

संबंधित प्रश्‍न

With the help of a neat labelled diagram, describe the Geiger- Marsden experiment


The positively charged part of the atom possesses most of the mass in ______.


Suppose you are given a chance to repeat the alpha-particle scattering experiment using a thin sheet of solid hydrogen in place of the gold foil. (Hydrogen is a solid at temperatures below 14 K.) What results do you expect?


Define the distance of closest approach. An α-particle of kinetic energy 'K' is bombarded on a thin gold foil. The distance of the closest approach is 'r'. What will be the distance of closest approach for an α-particle of double the kinetic energy?


Write two important limitations of Rutherford's nuclear model of the atom.


In a Geiger-Marsden experiment, calculate the distance of closest approach to the nucleus of Z = 80, when a α-particle of 8Mev energy impinges on it before it comes momentarily to rest and reverses its direction.

How will the distance of closest approach be affected when the kinetic energy of the α-particle is doubles?


In a Geiger-Marsden experiment, calculate the distance of closest approach to the nucleus of Z = 75, when a α-particle of 5 MeV energy impinges on it before it comes momentarily to rest and reverses its direction.

How will the distance of closest approach be affected when the kinetic energy of the α-particle is doubles?


Answer the following question.
A charged particle q is moving in the presence of a magnetic field B which is inclined to an angle 30° with the direction of the motion of the particle. Draw the trajectory followed by the particle in the presence of the field and explain how the particle describes this path.


Alpha particles used in Geiger-Marsden experiment were obtained from ______.


In Geiger-Marsden experiment prediction was that ______.


In Geiger-Marsden experiment, actual results were ______.


If the radius of second electron orbit in hydrogen atom be r then the radius of the third orbit will be ______.


A radioactive nucleus (initial mass number A and atomic number Z) emits 3 α- particles and 2 positrons. The ratio of the number of neutrons to that of protons in the final nucleus will be:


The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3rd orbit will be:-


Which of the following transition in a hydrogen atom emit photon of the highest frequency:


The ratio active Nude 7N13 decays 6C13 through the emission of


O2 molecule consists of two oxygen atoms. In the molecule, nuclear force between the nuclei of the two atoms ______.


A narrow beam of protons, each having 4.1 MeV energy is approaching a sheet of lead (Z = 82). Calculate:

  1. the speed of a proton in the beam, and
  2. the distance of its closest approach

Radius of the 1st orbit of hydrogen atom is r0. What will be the radius of the 4th orbit?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×