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Chemistry MCQ Question - Atomic Structure

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1. All of the following were theorized by Bohr in his description of the atom except




2. The letters s p d and f are used to represent which quantum numbers




3. The magnetic quantum number (QN) has its values determined directly by the value of




4. The atomic number of an element having maximum number of unpaired electrons in p-subshell is




5. The maximum number of electron in a sub shell with ? = 3fs




6. Radius of the third shell of H-atom is




7. When an atom absorbs energy the lines in the spectrum will appear which are




8. Colour of fluorescene produced by cathode rays depends upon




9. Which one is not true about cathode rays?




10. Positive rays are produced




11. A fast moving neutron can eject from nitrogen




12. Rutherfords planet like structure was defective and unsatisfactory because




13. The relationship between energy of a photon of light and its frequency is given by




14. Splitting of spectral lines when atom is subjected to magnetic field is called




15. The velocity of the photon




16. Which one of the following explain the shape of orbitals




17. Atom cannot be divided into simple unitstheorized by




18. Pressure in gas discharge tube was kept




19. The number of fundamental particles in an atom of the lightest isotope carbon are




20. Angle of deflection was studied by




21. Increase in atomic number is observed during




22. Positive rays give flash on




23. Free neutron changes into proton with the emission of




24. The value of e/m ratio of electron is




25. Charge of electron was measured by




26. Rutherford bombarded ______________ particles in discovery of nucleus




27. Planks theory says energy is emitted




28. Angular momentum of an electron




29. 2nd orbit is _______ away from nucleus of H-atom as compared to 1st orbit is




30. The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be




31. The correct electronic configuration of Cu is




32. Pfund series are produced in the spectrum of hydrogen atom




33. Atomic orbits having same evergy are called




34. Sommerfelds modification in Bohrs model is




35. When electrons collide with heavy metals than ______ are produced.




36. Plancks equation is




37. Atom with higher atomic number produces X-rays of




38. Wavelength of electron was verified by




39. Space around nucleus where finding probability of electrons is maximum is called




40. Quantum number which tells the energy of electron is




41. Electronic configuration of K is




42. ____________ can expel proteons from paraffins




43. Milikan used __________ in his atomizer




44. Milikan used __________ in his atomizer




45. Centrifugal forces are balanced in atom by




46. Spectrum is produced due to




47. When 6d orbital is complete the entering electron goes into




48. When electron jump into orbit 1 then series obtained is




49. Neutrons moving with an energy of 1.2 MeV are called




50. Splitting of spectral lines when atoms are subjected to strong electric filed is called