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An energy of 24.6 eV is required to remo...

An energy of `24.6 eV` is required to remove one of that electrons from a neutal helium atom. The enegy (in `eV`)required to remove both the electrons from a netural helium atom is

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The correct Answer is:
D
`E = 24.6 + (13.6(2)^(2))/(1^(2)) = 79.0 eV`
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ALLEN -SIMPLE HARMONIC MOTION-Exercise-01
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  2. The diagram to the right shows the lowest four energy levels for an el...

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  3. An energy of 24.6 eV is required to remove one of that electrons from ...

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  4. A photons was absorbed by a hydrogen atom in its ground state, and the...

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  5. The K(alpha) X-ray emission line of tungsten occurs at lambda = 0.021 ...

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  6. Which of the following are the characteristics required for the target...

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  7. The wavelength of K(alpha) line for an element of atomic number 43 is ...

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  8. The wavelength of K(alpha) X-rays of two metals A and B are 4 // 1875 ...

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  9. On operating an X-ray tube at 1 kV. X-rays of minimum wavelength 6.22Å...

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  10. In an X-rays tube, electrons striking a target are brought to rest, ca...

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  11. The production of characteristic X-rays is due to-

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  12. The constant 'a' Mosely's law sqrt(v) - a(Z-b) for k(alpha)X-rays is r...

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  13. Characteristic X-rays are not obtained in the spectrum of H-atom becau...

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  14. For the decay of nucleus, the possible reason which is not true

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  15. Assuming that 200MeV of energy is released per fission of uranium ato,...

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  16. If the binding energy per nucleon in .(3)Li^(7) and .(2)He^(4) nuclei ...

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  17. The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u= ato...

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  18. The binding energy of deuteron is 2.2 MeV and that of .(2)^(4)He is 28...

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  19. In an alpha -decay, the kinetic energy of alpha-particles is 48 MeV a...

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  20. When a neutron is disintegrated, it gas :-

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