In an electron capture process, a nucleus captures an electron from K shell of the atom. The electron is having a binding energy of `B_(0)`. Followed by this capture of electron, several photons are emitted due to electronic transitions. What will be Sum of energy of all such photons emitted?
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An electron collides with a dfixed hydrogen atom in its ground stat. Hydrogen atom gets excited and the collding electron loses all its kinetic energy
Correct Answer - 2 Kinetic energy of electron `= 13.6 [1-1/9] eV = 12.1 eV`.
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The ionisation energy of `H` atom is `21.79xx10^(-19) J`. The the value of binding energy of second excited state of `Li^(2+)` ion
Correct Answer - B B.E.`=(21.79xx10^(-19)(3)^(2))/((3)^(2))=21.79xx10^(-19)J`
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Photon having energy equivalent to the binding energy of `4th` state of `He^(+)` atom is used to eject an electron from the metal surface of work func
Correct Answer - 5 In the particular excited state of H-atom, path length is five times the de-Broglie wavelength. `:. 2pir=5lambda …(1)` However, path length in a sate `n` is `n`...
2 Answers 1 views
There is a hemispherical shell having charge Q uniformly distributed on its surface. Radius of the shell is R. Find electric potential and field at th
Correct Answer - `E=(q)/(8pi in_(0)R^(2));(q)/(4pi in_(0)R)`
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Which of the followings can excite a hydrogen atom in ground state? (i) A photon having 11 eV energy (ii) A neutron having `11 eV` kinetic energy (iii
Correct Answer - An electron having `11 eV` kinetic energy.
2 Answers 2 views
In a X-ray tube, after an electron has been removed from an inner shell of a target atom, an electron from outer shell falls into the vacancy and the
Correct Answer - `E_(k) - 2E_(L)`
2 Answers 1 views
At what speed must an electron revolve around the nucleus of hydrogen atom so that it may not be pulled into the nucleus by electrostatic attraction?
Correct Answer - `2.25 xx 10^(6) ms^(-1)`
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By giving energy to a hydrogen atom in energy state n=1. If the potential energy of the atom in n=1 state be `-13.6 eV`, calculate (a) potential enreg
Correct Answer - `-0.85 eV, 12.75 eV, 971 Å`
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Calculate the binding energy per nucleon for a `._(6)C^(12)` nucleus. Atomic mass of `._(6)C^(12) = 12am u`, mass of a photon = 1.007825 amu, mass of
Correct Answer - 7.68 MeV
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Calculate the separation of the particles and the binding energy of a positronium (an atom consisting of an electron and a position revolving around t
Correct Answer - 106 pm, 6.8 eV
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