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Atoms and Nucle...

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  • Question 1
    4 / -1

    The ratio of areas of the electron orbits for the first excited state and the ground state for the hydrogen atom is

  • Question 2
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    Which of the following lines of the H–atom spectrum belongs to the Balmer series?

  • Question 3
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    The ratio of kinetic energy and the total energy of the electron in the nth quantum state of Bohr's atomic model of hydrogen atom is

  • Question 4
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    The first excitation potential of a given atom is 10.2 V. Then, ionisation potential must be

  • Question 5
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    The ratio of minimum to maximum wavelength in Balmer series is

  • Question 6
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    The ground state energy of hydrogen atom is i 3.6 eV. When its electron is in the first excited state, its excitation energy is

  • Question 7
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    Solar spectrum is an example for

  • Question 8
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    In the Bohr model of hydrogen atom, the electron is pictured to rotate in a circular orbit of radius 5 × 10-11 m, at a speed 2.2 × 106 ms-1 . What is the current associated with electron motion?

  • Question 9
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    The ionisation potential of hydrogen atom is –13.6 eV. An electron in the ground state of a hydrogen atoms absorbs a photon of energy 1275 eV. How many different spectral line can one expect when the electron make a downward transition?

  • Question 10
    4 / -1

    First Bohr radius of an atom with Z = 82 is R. Radius of its third orbit is

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