Wavelength of the \(K_\alpha\) characteristics X-ray of iron and potassium are 1.931 \(\times\) 10-8  and 3.737  \(\times\) 10-8  cm respectively. What is the atomic number  and  name of the element of which characteristics  \(K_\alpha\)   wavelength is 2.289 \(\times\) 10-8  cm .

  • 24

  • 25

  • 26

  • 27

 Calculate the wavelength emitted during the transition of electron in between two levels of Li2+ ion whose sum is 4 and difference is 2 ?

  •   3.14 x 10-6 cm

  •  2 1.14 x 10-5 cm

  •   1.14 x 10-6 m

  •   1.14 x 10-6 cm

Correct sequence of the increasing order of effective nuclear charge (Zeff)  of s, p and d sub-shells is -
  •  d = p < s
  •  d < p < s
  •  d > p < s
  • d < p > s
Correct distribution of electrons in oxygen atom using orbital diagram among the following is -
 
Correct electronic configuration of Ni+2 ion among the following is -
  • 4s0,3d8
  • 4s2, 3d6
  • 4s2,3d10
  • 4s1,3d5
Non-degenerated orbital among the following is -
  •   px
  • d xy
  • 2s
  • d yz
The number of angular nodes and radial nodes present in 3p orbital is respectively-
 
  • 2,3
  • 1,1
  • 1, 2
  • 2,1
 Orbitals among the following has the highest energy is -
  •   5d
  •   5f
  •   6s
  •   6p
The particle among the following does not show deflection from the path on passing through an electric field is -
  •   Proton
  •   Cathode rays
  •  3 . Electron
  •   Neutron
Atomic number of the atom having atomic mass number 13 has 7 neutrons is -
  • 13
  • 7
  • 6
  • 8
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