Atomic Structure (F)

10 Questions | Attempts: 12
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  • 1/10 Questions

    For which species Bohr's theory does not apply?

    • H
    • He+
    • Li2+
    • Be
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Atomic Structure (F) - Quiz

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  • 2. 

    Which of the following configuration is not correct according to  Hund's rule?

    • A

    • B

    • C

    • Option 4

    Correct Answer
    A. B
  • 3. 

    Which one of the following is not isoelectronic pair?

    • Mg2+, Be2+

    • N3-, O2-

    • N3-,  F-

    • F1-, Al3+

    Correct Answer
    A. Mg2+, Be2+
  • 4. 

    From discharge tube experiments it is concluded that:

    • Mass of a  proton is in fraction

    • Matter contained electron

    • Nucleus contains positive charge

    • Positive rays are heavier than proton

    Correct Answer
    A. Matter contained electron
  • 5. 

    The electronic configuration of species M2+ is 1s2, 2s2, 2p6, 3s2, 3p6,3d6 and its atomic weight is 56  amu, the number of neutron in the nucleus of species M is

    • 20

    • 26

    • 28

    • 30

    Correct Answer
    A. 30
  • 6. 

    The energy of an electromagnetic radiation 3 × 10-12 ergs. What is its wave length in nano meter

    • 400

    • 228.3

    • 3000

    • 662.5

    Correct Answer
    A. 228.3
  • 7. 

    Which one of the following statement is not correct?

    • Rydberg's constant and  wave number have same unit

    • Lyman series of hydrogen spectrum occurs in the ultraviolet region.

    • The angular movement of the electron in the ground state of hydrogen atom is equal to h/2𝝅

    • The radius of first Bohr orbit of hydrogen atom is 2.116 ×108 cm.

    Correct Answer
    A. The radius of first Bohr orbit of hydrogen atom is 2.116 ×108 cm.
  • 8. 

    The third line in Balmer sereis  corresponds to an electronic transfer between which Bohr's orbit in hydrogen.

    • 5 → 3

    • 5 → 2

    • 4 → 3

    • 4 → 2

    Correct Answer
    A. 5 → 2
  • 9. 

    When an electron of charge 'e' and mass 'm' moves with velocity 'v' about the nuclear charge Ze in a circular orbit of radius 'r', the P.E. of electron is given by

    • Ze2/r

    • -Ze2/r

    • Ze2/r2

    • Mv2/r

    Correct Answer
    A. -Ze2/r
  • 10. 

    Which of the following does not tell about shells of an atom?

    • Principle quantum number , n

    • Azimuthal quantum number, l

    • Magnetic quantum number, m

    • Spin quantum number, s

    Correct Answer
    A. Principle quantum number , n

Quiz Review Timeline (Updated): Jun 15, 2021 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jun 15, 2021
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 15, 2021
    Quiz Created by
    Zafar Iqbal
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