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When an electron of hydrogen like atom j...

When an electron of hydrogen like atom jumps from a higher energy level to a lower energy level.

A

Angular momentum of the electron remains constant

B

Kinetic energy increases

C

Wavelength of de-Broglie wave, associated with motion of the electron, decreases

D

none of these

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When an electron drops from a higher energy level to a low energy level, then

Hydrogen atom: The electronic ground state of hydrogen atom contains one electron in the first orbit. If sufficient energy is provided, this electron can be promoted to higher energy levels. The electronic energy of a hydrogen-like species (any atom//ions with nuclear charge Z and one electron) can be given as E_(n)=-(R_(H)Z^(2))/(n^(2)) where R_(H)= "Rydberg constant," n= "principal quantum number" The energy required to promote the ground state electron of H-atom to the first excited state is: When an electron returns from a higher energy level to a lower energy level, energy is given out in the form of UV//Visible radiation.

Knowledge Check

  • When an electron drops from a higher energy level to a low energy level, then

    A
    Energy is emitted
    B
    Energy is absorbed
    C
    Atomic number increases
    D
    Atomic number decreases

  • If Delta E is the energy emitted in electron vots when an electronic transition occurs from higher energy level to a lower energy level in H-atom, the wavelength of the line produced is approximately equal to

    A
    `(19800)/(DeltaE) Å`
    B
    `(12375)/(DeltaE) Å`
    C
    `(13600)/(Delta E) Å`
    D
    `(21800)/(Delta E) Å`

  • An electron in a hydrogen atom undergoes a transition from higher energy level to a lower energy level. The incorrect statement of the following is

    A
    kinetic energy of the electron increases.
    B
    velocity of the electron increases
    C
    angular momentum of the electron remains constant.
    D
    wavelengths of de-Broglie wave associated with the motion of electron decreases.

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    What happens when an electron jumps from a lower energy level to a higher energy level?

    If the electron jumps from 7.00 eV energy level to 5.0 eV energy level it

    In an atom when an electron jumps from higher energy level to lower energy level it amits energy in form of elecromagnetic radiations. When these elecromagnetic radiations are passed through a prism and received on a photographic film some lines are observed on that film and those lines are called spectral lines. For hydrogen like species when jump takes from any excited state to ground state (n=1) , line produced in that case is called a Lyman series line. If transition occurs from 3rd or above level to second level then corresponding lines produced are called Balmer lines. Similarly, for next level it is called Paschen series line. If there are 3 atoms of a hydrogen like species one in 2nd one in 3rd and one in 4th excited state, then how many maximum total different Balmer and Paschen lines can be produced ?

    In an atom when an electron jumps from higher energy level to lower energy level it amits energy in form of elecromagnetic radiations. When these elecromagnetic radiations are passed through a prism and received on a photographic film some lines are observed on that film and those lines are called spectral lines. For hydrogen like species when jump takes from any excited state to ground state (n=1) , line produced in that case is called a Lyman series line. If transition occurs from 3rd or above level to second level then corresponding lines produced are called Balmer lines. Similarly, for next level it is called Paschen series line. The wavelength of photon corresponding ot second least energy of Lyman series in H-atom is :

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