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The line spectrum of two elements is no...

The line spectrum of two elements is not identical because

A

They do not have same number of neutrons

B

They have dissimilar mass number

C

They have diffeent enrgy level schemes

D

They have different number of velence eelctrons

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The correct Answer is:
C
A reason for the given fact .
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P BAHADUR-ATOMIC STRUCTURE-Exercise 3A
  1. Which of the following sets of quantum numbers represents an imposs...

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  2. Two elements in I transition series have four unparired electrons in t...

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  3. The line spectrum of two elements is not identical because

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  4. If the speed of electron in the first bohr orbit of hydrogen atom is x...

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  5. The elecronic configuration 1s^2 ,1s^2 2p^6, 3s^1 3p^1 correctly descr...

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  6. Which of the following statement //s is not correct ?

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  7. Rutherfore's alpha particke scatterubg exoerunebt evebtykk ked if tge ...

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  8. Which element isrepresencted by the following electronic configuration...

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  9. F-orbitals in presence of magnetic field are :

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  10. how fast is an elecreon moving if it has a wavelength equal to the dis...

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  11. The work functio of a substance is 4.0 eV. The longest wavelength of ...

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  12. The electron in a hydrogen atom makes a transition from an excited sta...

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  13. The transition from state n = 4 to n = 3 in a He^(o+) ion result in u...

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  14. A hydrogen atom and a Li^(2+) ion ae both in the second excited state ...

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  15. psi(310) has :

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  16. de-Broglie concept of wave is related to :

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  17. Which of the following is correct for the same radius of ion ieach pai...

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  18. IE1 for .1H^2 and IE1 for .1H^1 are related as ?

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  19. The spein multipltcity for the orbital enryron si 2s +1where (s) is t...

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  20. The enrgy level fo 4s-orbital is less than 3d- orbital because :

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