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Why is the electronic configuration, 1s^...

Why is the electronic configuration, `1s^2, 2s^2, 2p_x^(2), 2p_y^(1), 2p_z^(0) is not correct for ground state of nitrogen ?

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MBD PUBLICATION-STRUCTURE OF ATOM-QUESTION TYPE
  1. Calculate the energy of photon of radiations having v = frequency 5xx1...

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  2. With what velocity must an electron travel so that its momentum is equ...

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  3. Why is the electronic configuration, 1s^2, 2s^2, 2px^(2), 2py^(1), 2pz...

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  4. Mass of neutron is……..times the mass of electron.

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  5. The maximum number of unpaired electrons present in 4f-energy level is...

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  6. Which is not deflected by magnetic field ?

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  7. In the atomic spectrum of hydrogen the series of lines observed in the...

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  8. The maximum sum of the number of neutrons and protons in an isotope of...

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  9. Which of the subshell has double dumb-bell shape ?

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  10. Which one of the following pairs of atoms/atom-ions have identical gro...

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  11. The ratio of nucleons in O^16 and O^18 is:

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  12. The number of unpaired electrons in Mn^+ is:

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  13. The (n+1) value for 4f-electron is:

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  14. The ejection of electrons when the surface of metal is irradiated by l...

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  15. The n+l value for the 3-p energy level is:

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  16. If uncertainty in position of electron is zero, the uncertainty in its...

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  17. 1 fermi is equal to:

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  18. Nucleus model of the atom was proposed by:

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  19. Maximum number of electrons present in "N" shell is:

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  20. The de Broglie wavelength associated with a material particle is:

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