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When hydrogen atom is in its second exci...

When hydrogen atom is in its second excited level, then its radius becomes

A

half

B

double

C

5 times

D

nine times

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The correct Answer is:
A
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TARGET PUBLICATION-ATOMS, MOLECULES AND NUCLEI -Evaluation test
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  2. Two radioactive materials X(1) and X(2) have decay constants 5 lambda ...

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  3. What amount of energy should be added to an electron to reduce its de-...

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  4. In the process of nuclear fission of 1g uranium, the mass lost is 0.90...

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  5. Assertion: Lyman series lies in the visible region of electromagnetic ...

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  6. When a hydrogen atom is excited from ground state to first excited s...

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  7. A stationary helium ion emits a photon corresponding to the first line...

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  8. Average lifetime of a hydrogen atom excited to n =2 state is 10^(-6)s ...

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  9. The binding energy per nucleon for ""(1)H^(2) and ""(2)He^(4) are 1.1 ...

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  10. Binding energy per nucleon for C^(12) is 7.68 MeV and for C^(13) is 7....

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  11. Half-life of a substance is 10 minutes. The time between 33% decay and...

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  12. An hydrogen atom moves with a velocity u and makes a head on inelastic...

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  13. Magnetic moment by virtue of the orbital motion of an electron in an a...

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  14. The minimum kinetic energy of a ground state hydrogen atom required to...

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  15. When a deuteron of mass 2.0141 a.m.u and negligible K.E. is absorbed b...

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  16. A material found within the body of an organism trapped in an ice berg...

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  17. Assertion: Ionisation energy of atomic hydrogen is greater than atomic...

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  18. Transition between three energy energy levels in a particular atom gi...

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  19. If the average life time of an excited state of hydrogen is of the ord...

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  20. A beam of monochromatic light of wavelength lambda ejects photoelectro...

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