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The radius of hydrogen atom in it's grou...

The radius of hydrogen atom in it's ground state is `5.3 × 10^-11 m`. After collision with an electron, it is found to have a radius of `21.2 × 10^-11 m`. What is the principal quantum number `n` of the final state of the atom ?

A

`n=4`

B

`n=2`

C

`n=16`

D

`n=3`

Text Solution

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The correct Answer is:
B
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SURA PUBLICATION-NUCLEAR PHYSICS-ADDITIONAL QUESTIONS & ANSWER (FILL IN THE BLANKS)
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  2. When a hydrogen atom is raised from the ground state to an excited sta...

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  3. The radius of hydrogen atom in it's ground state is 5.3 × 10^-11 m. Af...

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  4. The radius of hydrogen atom in it's ground state is 4 × 10^-13 m. Afte...

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  5. The radius of hydrogen atom in it's ground state is 0.1 × 10^-7 m. Aft...

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  6. In the Bohr's hydrogen atom model, the radius of the stationary orbit ...

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  7. In the Bohr's hydrogen atom model, the radius of the stationary orbit ...

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  8. The energy required to knock out the electron in the fifth orbit of a ...

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  9. The energy required to knock out the electron in the seventh orbit of ...

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  10. In terms of Bohr radius a0, the radius of the second Bohr orbit of a h...

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  11. The ionization energy of hydrogen atom is 13.6 eV. Following Bohr's th...

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  12. The elements whose atomic number is more than 83 undergo radioactivit...

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  13. Most of the radioactive elements are and metals.

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  14. Technitium with atomic number .

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  15. The mass of an atom is concentrated in its central part called.

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  16. Henry Becquerel discovered in 1896.

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  17. is a radioactive element.

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  18. Radium emitted radiations spontaneously like .

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  19. is known as an ore of uranium.

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  20. elements emit harmful radioactive radiations.

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