Home
Class 12
PHYSICS
Energy required for the electron excitat...

Energy required for the electron excitation in `Li^(++)` from the first to the third Bohr orbit is

A

`12.1` eV

B

`36.3` eV

C

`108.8` eV

D

`122.4` eV

Text Solution

Verified by Experts

The correct Answer is:
C
`E_(n) =(-13.6)(Z^(2))/(n^(2))`
`Delta E = E_(3) - E_(2) = 13.6(3)^(2)[(1)/(1^(2)) - (1)/(3^(2))]`
` = (13.6 xx 9 xx 8)/(9) = 108.8 eV`
Promotional Banner

Topper's Solved these Questions

  • ATOMIC AND NUCLEAR PHYSICS

    FULL MARKS|Exercise Additional question (Short Answer Questions)|6 Videos

  • ATOMIC AND NUCLEAR PHYSICS

    FULL MARKS|Exercise Additional question (Numerical Problems)|12 Videos

  • ATOMIC AND NUCLEAR PHYSICS

    FULL MARKS|Exercise Textual Evaluation Solved (Exercise)|11 Videos

  • COMMUNICATION SYSTEMS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS  (Additional problems)|3 Videos

Similar Questions

Explore conceptually related problems

(a)Find the wavelength of the radiation required to excited the electron is Li^(++) from the first to the third Bohr orbit (b) How many spectral lines are obseved in the emission spactrum of the above excited system?

A doubly ionised lithium atom is hydrogen like with atomic number Z = 3 . The wavelength of radiation required to excite the electron in Li^(2+) from first to third Bohr orbit will be ______ . (Ionisation energy of hydrogen atom is 13.6 eV)

In the nth orbit, the energy of an electron En = -13.6 / n^2 eV hydrogen atom. The energy required to take the electron from first orbit to second orbit will be

The energy required to remove an electron in a hydrogen atom from n=10 state is

In Bohr's model of hydrogen atom, the radius of the first electron orbit is 0.53 A. What will be the radius of the third orbit?

The energy required to knock out the electron in the fifth orbit of a hydrogen atom is equal to

A particle known as mu mean has a charge equal to that of no electron and mass 208 times the mass of the electron B moves in a circular orbit around a nucleus of charge +3e Take the mass of the nucles to be infinite Assuming that the bohr's model is applicable to this system (a)drive an eqression for the radius of the nth Bohr orbit (b) find the value of a for which the redius of the orbit it approninately the same as that at the first bohr for a hydrogen atom (c) find the wavelength of the radiation emitted when the u - mean jump from the orbit to the first orbit

FULL MARKS-ATOMIC AND NUCLEAR PHYSICS-Additional question (Multiple Choice Question)
  1. Which of the following transitions in hydrogen atoms emits photon of h...

    Text Solution

    |

  2. The wavelenths involved in the spectrum of deuterium (""(1)^(2)H) are ...

    Text Solution

    |

  3. Energy required for the electron excitation in Li^(++) from the first ...

    Text Solution

    |

  4. Minimum energy required to take out the only one electron from ground ...

    Text Solution

    |

  5. Energy of characteristic X-ray is a consequence of

    Text Solution

    |

  6. How much energy is needed to excite an electron in H-atom from ground ...

    Text Solution

    |

  7. For an electron is the second orbit of hydrogen, what is the moment of...

    Text Solution

    |

  8. The total energy of an electron in the first excited state of hydrogen...

    Text Solution

    |

  9. The energy of the ground state of hydrogen is -13.6eV. The energy of t...

    Text Solution

    |

  10. The total energy of electron in the ground state of hydrogen atom is (...

    Text Solution

    |

  11. Bohr's theory of hydrogen atom didi not explain fully

    Text Solution

    |

  12. In Bohr's model of an atom, which of the following is an integral mult...

    Text Solution

    |

  13. According to Bohr's theory, relation between n and radius of orbit is:

    Text Solution

    |

  14. In Bohr's model of hydrogen atom, the radius of the first electron orb...

    Text Solution

    |

  15. In Bohr model of hydrogen atom, which of the following is quantised?

    Text Solution

    |

  16. In Bohr's model, the atomic radius of the first orbit is r(0). Then, t...

    Text Solution

    |

  17. What is the ratio of Bohr magneton to the nuclear magneton?

    Text Solution

    |

  18. In terms of Bohr radius a(0), the radius of the second Bohr orbit of h...

    Text Solution

    |

  19. If an alpha- particle collides head on with a nucleus, what is impact ...

    Text Solution

    |

  20. One femtometre is equivalent to

    Text Solution

    |