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Structure of Atom
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Structure of Atom
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25 Questions

1. Which of the following is isoelectronic?[2002]
2. In the photo-electron emission - the energyof the emitted electron is [1994]
3. The correct set of four quantum numbersfor the valence electron of rubidium atom (Z=)37 is [2012]
4. If ionization potential for hydrogen atom is13.6 eV - then ionization potential for He + will be[1993]
5. Which of the following is never true forcathode rays? [1994]
6. Number of unpaired electrons in N 2+ is[1989]
7. The electron was shown experimentally tohave wave properties by [1994]
8. The measurement of the electron position ifassociated with an uncertainty in momentum - which is equal to 1 × 10-“18 g cm s-“1Theuncertainty in electron velocity is - (mass of anelectron is 9 × 10-“28 g) [2008]
9. 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]
10. The maximum number of electrons in asubshell is given by the expression [1989]
11. The ion that is isoelectronic with CO is[1997]
12. Which of the following has the minimumbond length? [2011]
13. The orbitals are called degenerate when[1996]
14. Uncertainty in position of an electron (mass= 9.1 × 10-“28 g) moving with a velocity of 3 × 104cm/s accurate upto %0.001 will be (use h/4 Ï€)in uncertainty expression where h = 6.626 ×10-“27 erg-second) [1995]
15. The number of spherical nodes in 3p orbitalsare [1988]
16. 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]
17. According to the Bohr Theory - which of thefollowing transitions in the hydrogen atom willgive rise to the least energetic photon? [2011 M]
18. Which one of the following species does notexist under normal conditions? [2010]
19. The total number of atomic orbitals in fourthenergy level of an atom is: [2011]
20. The energy of second Bohr orbit of thehydrogen atom is 328 kJmol1 hence the energyof fourth Bohr orbit would be: [2005]
21. In hydrogen atom - energy of first excitedstate is -“3.4 eV. Find out KEof the same orbit of Hydrogen atom [2002]
22. The momentum of a particle having a deBroglie wavelength of 10-“17 metres is (Given h =6.625 × 10-“34 Js) [1996]
23. An ion has 18 electrons in the outermostshell - it is [1990]
24. Maximum number of electrons in a subshellof an atom is determined by the following:[2009]
25. The order of filling of electrons in theorbitals of an atom will be [1991]

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