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The ratio of frequencies of shortest wavelengths of Balmer and Lyman series of hydrogen atom is

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Important Questions on Atoms

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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment Set-2>Q 59
When an electron jumps from a level n=4 to n=1 in a hydrogen atom, the momentum of the recoiled hydrogen atom will be 6.8×10-N kg m s-1. Value of N, is _____ .
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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment Set-2>Q 60
In the hydrogen atom Hα line arises due to transition of electron from 3rd orbit to 2nd orbit. In the spectrum of singly ionised helium there is a line having almost the same wavelength as that of line. This is due to transition of electron between the orbits n1 to n2. Value of n1×n2, is _____
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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment>Q 1
What would be the ratio of product of speed and time period of electron orbiting 3rd and 4th stable orbit in Bohr's atomic model?
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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment>Q 2
Suppose the potential energy between electron and proton at a distance r is given by -Ke23r3. As per Bohr's quantization rule, the speed of electron in nth orbit of H-atom is
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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment>Q 3
A particle of mass M moves in a circular orbit in such a way that the potential energy is U=ar2, where a is a constant and $r$ is the distance of particle from the origin. Assuming the Bohr's quantization rule to be valid, find the radius of nth allowed orbit?
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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment>Q 4
Electrons in hydrogen like atom (z=3) make transitions from fifth to fourth orbit and fourth to third orbit. The resulting radiation are incident normally on a metal plate and eject photoelectrons. If the work function of metal is 1.99 eV, then the ratio of stopping potential for electrons ejected out by shorter wavelength of radiation to electrons ejected out by larger wavelength is
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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment>Q 5
In a hydrogen-like atom of atomic number Z, electron is in nth Bohr orbit. The magnetic field at nucleus due to revolving electron is proportional to
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Gamma Question Bank for Engineering Physics>Chapter 28 - Atoms>Assignment>Q 6
A neutron moving with some kinetic energy collides head-on with a stationary helium ion He+ in its ground state. The minimum kinetic energy of neutron so that the collision can be inelastic, is