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Atoms Test - 67...

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  • Question 1
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    Let $$v_{1}$$ be the frequency of the series limited of the Lyman series, $$v_{2}$$ be the frequency of the first line of the Lyman series, and $$v_{3}$$ be the frequency of the series limited of the Balmer series. Then:

  • Question 2
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    If $$ A_{n}$$ is the area enclosed in the $$ n$$th orbit in a hydrogen atom then the graph log $$ \left ( \frac{A_{n}}{A_{1}} \right )$$ against log $$ n$$: 

  • Question 3
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    The quantum number n of the state finally populated in $$He^{+}$$ ions is 

  • Question 4
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    In the figure six lines of emission spectrum are shown. Which of them will be absent in the absorbtion spectrum.

  • Question 5
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    Check the correctness of the following statements about the Bohr Model of hydrogen atom:
    $$(i)$$ The acceleration of the electron in $$n=2$$ orbit is more than that in $$n=1$$ orbit.
    $$(ii)$$ The angular momentum of the electron in $$n=2$$ orbit is more than that in $$n=1$$ orbit.
    $$(iii)$$ The KE of the electron in $$n=2$$ orbit is less than that in $$n=1$$ orbit

  • Question 6
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    Directions For Questions

    The physics teacher in class explained Bohr model of atom. He told that Bohr assumed that angular momentum is quantized. A student very politely wanted to confirm whether the same phenomenon can be applied elsewhere, for example, in planetary system or other systems in which some particles revolve about the other. Another student was anxious to know can de-Broglie relation be applied. Physics teacher explained so beautifully about classical and quantum mechanical nature.

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    The absorption spectrum of $$H$$-atom is found in _______.

  • Question 7
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    Directions For Questions

    A $$20 kg$$ satellite circles the earth once every $$2h$$ in an orbit having a radius of $$8060 km$$. Assume that Bohrs postulates are valid even in the satellite motion as for electrons in Hydrogen atom. Combine Newton's law of gravitation and Bohr's angular momentum to find radius of the orbit as a function of principle Quantum number.

    ...view full instructions

    Find the value of principal quantum number n corresponding 20 kg satellite.

  • Question 8
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    The figure above represents some of the lower energy levels of the hydrogen atom in simplified form.
    If the transition of an electron from $$E_4$$ to $$E_2$$ were associated with the emission of blue light, which one of the following transitions could be associated with the emission of red light?

  • Question 9
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    Directions For Questions

    A $$20 kg$$ satellite circles the earth once every $$2h$$ in an orbit having a radius of $$8060 km$$. Assume that Bohrs postulates are valid even in the satellite motion as for electrons in Hydrogen atom. Combine Newton's law of gravitation and Bohr's angular momentum to find radius of the orbit as a function of principle Quantum number.

    ...view full instructions

    Find the radius of first two allowed orbits.

  • Question 10
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    In a hydrogen atom, electron is in the $$n^{th}$$ excited state. It comes down to the first excited state by emitting $$10$$ different wavelengths. The value of $$n^{th}$$ is

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