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Isotopes have...

Isotopes have

A

Same number of protons

B

Same number of neutrons

C

Different number of electrons

D

Different atomic numbers

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(a) Two stable isotope of ._3Li^6 and ._3Li^7 have respective abundances of 7.5% and 92.5% . These isotopes have masses 6.01512 and 7.01600 u respectively. Find the atomic weight of lithium. (b) Boron has two stable isotopes ._5B^(10) and ._5B^(11) . Their respective masses are 10.01294 u and 11.00931u, and the atomic weight of boron is 10.81u. Find the abundaces of ._5B^(10) and ._5B^(11) .

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AAKASH INSTITUTE-STRUCTURE OF ATOM -ASSIGNMENT ( SECTION -A) Objective Type Questions (One option is correct)
  1. Rutherford's alpha- scattering experiment was successful in discoverin...

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  2. The general representation of the symbol of element 'X' is ( Z = Atomi...

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  3. Isotopes have

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  4. The number of neutrons in deuterium is

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  5. Which of the following species have maximum number of electrons ?

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  6. The range of wavelength of the visible light is

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  7. The correct seuence of frequency of the electromagnetic radiations in ...

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  8. The colour of light which has maximum frequency is

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  9. The kinetic energy of the photoelectrons depends upon the

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  10. The value of n(1) for Pashecn series of hydrogen spectrum is(n(1) = or...

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  11. Radius of Bohr's orbit of hydrogen atom is

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  12. Bohr theory is not applicable for

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  13. Which among the following scientists was successful in accounting for ...

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  14. How many spectral lines are seen for hydrogen atom when electron jump...

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  15. What is the energy associated with 3^(rd) energy shell of hydrgoen ato...

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  16. Find out the incorrect match

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  17. The de -Brogile wavelength associated with a matter particle is

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  18. de-Broglie wavelength applies only to

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  19. The wavelength associated with an electron moving with velocity 10^(10...

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  20. The formula for Heisenberg's uncertainty principle is

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