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A certain transition in H-spectrum from...

A certain transition in H-spectrum from an axcited state to ground state in one (or) more steps gives rise to total 10 lines. How many of these belongs to UV-spectrum.

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The correct Answer is:
4(UV-region i.e., `5 rarr 1, 4 rarr 1, 3 rarr 1, 2 rarr 1`)
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Atomic hydrogen is excited from the grounds state to the n^(th) state. The number of lines in the emission spectrum will be:

The electrons in the ground state for a single H-atom absorbs a photon of wavelength 97.28 nm and it reaches to maximum level .n. then when it returns from this level to ground state. Maximum numbers of lines can be obtained in its spectrum ?

Knowledge Check

  • A certain transition in H spectrum from an excited state to ground state in one or more steps gives rise to total 10 lines. How many of these belong to uv spectrum?

    A
    3
    B
    4
    C
    5
    D
    6

  • In a certain electronic transition from the quantum level, ‘n’ to the ground state in atomic hydrogen in one or more steps, no line belonging to the Bracket series is observed. What wave numbers may be observed in the Balmer series? (R = Rydberg Constant)

    A
    `(8R)/(9),(5R)/(36)`
    B
    `(3R)/(16),(8R)/(9)`
    C
    `(5R)/(36) , (3R)/(16)`
    D
    `(3R)/(4),(3R)/(16)`

  • In a certain electronic transition from the quantum level, 'n' to the ground state in atomic hydrogen in one or more steps, no line belonging to the Bracket series is observed. What wave number may be observed in the Balmer series ? (R = Rydberg Constant)

    A
    `(8R)/(9), (5R)/(36)`
    B
    `(3R)/(16), (8R)/(9)`
    C
    `(5R)/(36), (3R)/(16)`
    D
    `(3R)/(4), (3R)/(16)`

    • Similar Questions

    Explore conceptually related problems

    The electron in the ground state for a single H – atom absorbs a photon of wavelength 97.28nm and it reaches to maximum level ‘n’ then when it returns from this level to ground state. Maximum numbers of lines can be obtained in its spectrum?

    In a certain electronic transition from the quantum level, 'n' to the ground state in atomic hydrogen in one or more steps, no line belonging to the Brackett series is observed. What wave numbers may be observed in the Balmer series? (R=Rydberg Constant)

    A gaseous mixture contains hydrogen atoms in the 4^(th) excited state, He^(+) ions in 3^(rd) excited state and Li^(2+) in 2^(nd) excited state. The number of spectral lines obtained in the emission spectrum of this sample when all these atoms/ions return to the ground state is

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    The only electron in the hydrogen atom resides under ordinary conditions on the first orbit. When energy is supplied, the electron moves to higher energy orbit depending on the amount of energy absorbed. When this electron returns to any of the lower orbits, it emits energy. Lyman series is formed when the electron returns to the lowest orbit while Balmer series is formed when the electron returns to second orbit. Similarly, Paschen, Brackett and Pfund series are formed when electron returns to the third, fourth orbits from higher energy orbits respectively (as shown in figure) Maximum number of lines produced when an electron jumps from nth level to ground level is equal to (n(n-1))/(2) . For example, in the case of n = 4, number of lines produced is 6. (4 rarr 3, 4 rarr 2, 4 rarr 1, 3 rarr 2, 3 rarr 1, 2 rarr 1) . When an electron returns from n_(2) to n_(1) state, the number of lines in the spectrum will be equal to ((n_(2) - n_(1))(n_(2)-n_(1) +1))/(2) If the electron comes back from energy level having energy E_(2) to energy level having energy E_(2) then the difference may be expressed in terms of energy of photon as E_(2) - E_(1) = Delta E, lambda = (h c)/(Delta E) . Since h and c are constant, Delta E corresponds to definite energy, thus each transition from one energy level to another will prouce a higher of definite wavelength. THis is actually observed as a line in the spectrum of hydrogen atom. Wave number of the line is given by the formula bar(v) = RZ^(2)((1)/(n_(1)^(2)) - (1)/(n_(2)^(2))) Where R is a Rydberg constant (R = 1.1 xx 10^(7)) (i) First line of a series : it is called .line of logest wavelength. or .line of shortest energy.. (ii) Series limit of last of a series : It is the line of shortest wavelength or line of highest energy. In a single isolated atom in electron makes transition from 5^(th) excited state to 2^(nd) state the maximum number of different types of photons observed as

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