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Information about energy levels. Within ...

Information about energy levels. Within the atoms of a gas, comes from the study of

A

spectrum of the gas

B

fermi energy level of gas

C

thermionic emission in gas

D

photoelectric emission in gas

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The correct Answer is:
A
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A gas of identical hydrogen-like atoms has some atoms in the lowest in lower (ground) energy level A and some atoms in a partical upper (excited) energy level B and there are no atoms in any other energy level.The atoms of the gas make transition to higher energy level by absorbing monochromatic light of photon energy 2.7 e V . Subsequenty , the atom emit radiation of only six different photon energies. Some of the emitted photons have energy 2.7 e V some have energy more , and some have less than 2.7 e V . a Find the principal quantum number of the intially excited level B b Find the ionization energy for the gas atoms. c Find the maximum and the minimum energies of the emitted photons.

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In a sample of hydrogen atoms, all the atoms exist in two energy levels A and B. A is the ground level and B is some higher energy level. These atoms absorb photons of energy 2.7 eV and attain a higher energy level C.After this, these atoms emit photons of six different energies. Some of these photon energies are higher than 2.7 eV, some equal to 2.7 eV and some are loss than 2.7 eV. The principal quantum number corresponding to energy level C is

NIKITA PUBLICATION-ATOMS, MOLECULES AND NUCLEI-MCQs
  1. Which of the following series in the spectrum of the hydrogen atom lie...

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  2. Each line of Balmer series represents

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  3. Information about energy levels. Within the atoms of a gas, comes from...

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  4. An electron makes a transition from orbit n = 4 to the orbit n = 2 of ...

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  5. According to Bohr's theory, when an electron jumps from any higher orb...

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  6. Which of the following types of radiation is not emitted by the electr...

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  7. A spectral line is emitted when an electron

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  8. Lines of Lyman series are emitted by the hydrogen atom when the electr...

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  9. The spectral series of the hydrogen spectrum that lies in the ultravio...

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  10. Rydberg constant R is equal to

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  11. Line spectrum is obtained from the substances in

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  12. Infrared spectrum lies between

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  13. Which of the following are in the ascending order of wavelength?

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  14. Rydberg's constant is

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  15. If the mass of the electron is reduced to half the Rudberg constant

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  16. The Lyman transitions involve

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  17. The ratio of the wavelengths of H(alpha) and H(beta) lines of Paschen ...

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  18. Which series of H(2) atom lie in infrared region?

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  19. Which series of Hydrogen atom was first discovered?

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  20. Which of the following lines of Balmer series has longest wavelength?

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