Structure of Atom
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Structure of Atom
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25 Questions

1. The order of filling of electrons in theorbitals of an atom will be [1991]
2. Maximum number of electrons in a subshellwith: l = 3 and n = 4 is: [2012]
3. Which of the following species has four lonepairs of electrons? [1993]
4. The number of spherical nodes in 3p orbitalsare [1988]
5. The value of Planck\'s constant is 6.63 × 10-34Js. The velocity of light is 3.0 × 108 m s- 1. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 × 1015s-1? [2003]
6. The electron was shown experimentally tohave wave properties by [1994]
7. The spectrum of He is expected to be similarto that [1988]
8. The maximum number of electrons in asubshell is given by the expression [1989]
9. If the energy of a photon is given as: = 3.03× 10-“19 J then - the wavelength of the photon is:[2000]
10. According to Bohr-™s theory the energyrequired for an electron in the Li 2+ ion to beemitted from n = 2 state is (given that theground state ionization energy of hydrogenatom is 13.6 eV) [1999]
11. The total number of electrons that can beaccommodated in all the orbitals havingprincipal quantum number 2 and azimuthalquantum number 1 is [1990]
12. According to the Bohr Theory - which of thefollowing transitions in the hydrogen atom willgive rise to the least energetic photon? [2011 M]
13. In the photo-electron emission - the energyof the emitted electron is [1994]
14. Set of isoelectronic species is [2000]
15. Which of the following has the minimumbond length? [2011]
16. The momentum of a particle having a deBroglie wavelength of 10-“17 metres is (Given h =6.625 × 10-“34 Js) [1996]
17. Which one of the following species does notexist under normal conditions? [2010]
18. The correct set of four quantum numbersfor the valence electron of rubidium atom (Z=)37 is [2012]
19. The energy absorbed by each molecule (A 2)of a substance is 4.4 × 10-“19 Jand bond energyper molecule is 4.0 × 10-“19 JThe kinetic energyof the molecule per atom will be: [2009]
20. The ions O2-“ - F -“ - Na+ - Mg2+ and Al3+ areisoelectronicTheir ionic radii show [2003]
21. Number of unpaired electrons in N 2+ is[1989]
22. Maximum number of electrons in a subshellof an atom is determined by the following:[2009]
23. Which of the following is not permissiblearrangement of electrons in an atom? [2009]
24. If r is the radius of the first orbit - the radius ofnth orbit of H-atom is given by [1988]
25. When an electron of charge e and massm moves with a velocity v about the nuclearcharge Ze is circular orbit of radius r - thepotential energy of the electrons is given by[1994]

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