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How many spectral series appear in the e...

How many spectral series appear in the emission spectrum of atomic hydrogen?

A

six

B

four

C

five

D

seven

Text Solution

Verified by Experts

The correct Answer is:
A
Lyman, Balmer, Paschen, Bracket, Pfund, Humphries.
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Consider a gas consisting Li^(+2) (which is hydrogen like ion). (a) Find the wavelength of radiation required to excite the electron in Li^(++) from n=1 and n=3 . (Ionisation energy of the hydrogen atom equals 13.6 eV ). (b) How many spectral lines are observed in the emission spectrum of the above excited system?

A double ionised lithium atom is hydrogen like with atomic number 3 (i)Find the wavelength of the radiation to excite the electron in Li^(++) from the first to the third bohr orbit (lonisection energy of the hydrogen atom equals 13. 6) (ii) How many spectral lines are observed in the emission spetrum of the above excled system ?

Knowledge Check

  • Which of the following best describes the emission spectrum of atomic hydrogen

    A
    A discrete series of lines of equal intensity and equally spaced with respect to wavelength
    B
    a series of only your lines
    C
    a continous emissions of radiation of all frequencies
    D
    several discrete series of lines with both intensity and spaceing between the lines decreasing as the wave number increases with each series

  • The shortest wavelength spectral line in the brackett series of the spectrum of atomic hydrogen is the transition :

    A
    ` n _ 2 = oo to n _ 1 = 1 `
    B
    ` n _ 2 = 8 to n _ 1 = 4 `
    C
    ` n _ 2 = oo to n _1 = 4 `
    D
    ` n _ 2 = 4 to n _ 1 = 3 `

  • The third line of the Balmer series, in the emission spectrum of the hydrogen atom, is due to the transition from the

    A
    fourth Bohr orbit to the first Bohr orbit
    B
    fifth Bohr orbit to the second Bohr orbit
    C
    sixth Bohr orbit to the third Bohr orbit
    D
    seventh Bohr orbit to the third Bohr orbit

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    The wave number of the spectral line in the emission spectrum of hydrogen will be equal to (8)/(9) times the Rydberg's constant if the electron jumps from …………..:-

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    The ratio of longest wavelength and the shortest wavelength observed in the five spectral series of emission spectrum of hydrogen is

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