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When the electron jumps from a level n=4...

When the electron jumps from a level `n=4` to `n=1`, momentum of the recoiled hydrogen atom will be

A

Zero

B

`6xx10^(27)` kg m/s

C

`12.75xx10^(-19)` kg m/s

D

`13.6xx10^(-19)` kg m/s

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The correct Answer is:
A
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MODERN PUBLICATION-UNIT TEST PAPER - NO.8-EXERCISE
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  6. The radius of the smallest electron orbit in the hydrogen like atom is...

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  7. If the hydrogen atoms are excited to states with principal quantum num...

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  8. A hydrogen atom in the ground state absorbs 12.09 eV of energy . The c...

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  9. A hydrogen-like atom has one electron revolving around a stationary nu...

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  10. When the electron jumps from a level n=4 to n=1, momentum of the recoi...

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  17. Hydrogen (H), deuterium (D), singly ionized helium (He^(+)) and doubly...

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  18. A nucleus containing Z protons and N neutrons has a mass M . If the ma...

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  19. In extrinsic germanium crystal, the holes are provided by :

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