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In an orbital, for which n=3 and l=1, how many electrons can fit?

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Important Questions on Structure of Atom

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Among the following, which pair of d-orbitals will have electron density along the axis?
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Which one is a wrong statement?
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Which one of the following ions has electronic configuration [Ar3d6

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The outer electron configuration of Lu (Atomic No: 71) is:
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Which of the following ions has the maximum magnetic moment?
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The energy of H-atom in the ground state is -13.6 eV. Hence, energy in the second excited state is
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The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approximately (Planck's constant, h=6.63×10-34 J-s
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In Bohr series of lines of hydrogen spectrum, the third line from the red-end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?