Hydrogen ( 1 H 1 ), Deuterium ( 1 H 2 ), singly ionised Helium ( 2 He 4 ) + and doubly ionised lithium ( 3 Li 6 ) ++ all have one electron around the nucleus. Consider an electron transition from n = 2 to n = 1 . If the wave lengths of emitted radiation are λ 1 , λ 2 , λ 3 and λ 4 respectively then approximately which one of the following is correct ?

4 λ 1 = 2 λ 2 = 2 λ 3 = λ 4

λ 1 = 2 λ 2 = 3 λ 3 = 4 λ 4

MEDIUM

Earn 100

If the series limit frequency of Balmer series is $ν_{B}$ , then the series limit frequency of the Brackett series is

50% studentsanswered this correctly

Important Questions on Structure of Atoms and Nuclei

HARD

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

Explain the different types of spectral series.

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

Hydrogen (₁H¹), Deuterium (₁H²), singly ionised Helium (₂He⁴)⁺ and doubly ionised lithium (₃Li⁶)⁺⁺ all have one electron around the nucleus. Consider an electron transition from

n = 2

n = 1

. If the wave lengths of emitted radiation are

λ_{1}, λ_{2}, λ_{3}

and

λ_{4}

respectively then approximately which one of the following is correct ?

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The wavelength of the photon emitted by a hydrogen atom when an electron makes a transition from

n = 2

n = 1

state is:

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The atomic hydrogen emits a line spectrum consisting of various series. Which series of hydrogen atomic spectra is lying in the visible region?

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

Hydrogen atom in its ground state is excited by a monochromatic light of energy

13.06 eV

. The longest wavelength among the spectral lines is (Ionization energy of hydrogen atom is

13.6 eV

)

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The first three spectral lines of

H

-atom in the Balmer series are given

λ_{1}, λ_{2}, λ_{3}

considering the Bohr atomic model, the wave lengths of first and third spectral lines

(\frac{λ_{1}}{λ_{3}})

are related by a factor of approximately

x

\times 10^{- 1}

. The value of

x

, to the nearest integer, is ________.

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

According to Bohr atom model, in which of the following transitions will the frequency be maximum?

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

X

different wavelength may be observed in the spectrum from a hydrogen sample if the atoms are excited to states with principal quantum number

n = 6

? The value of

X

HARD

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

R

is the Rydberg constant in

{cm}^{- 1}

, then hydrogen atom does not emit any radiation of wavelength in the range of

HARD

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The Hitomi satellite recently observed the Lyman alpha emission line (

n = 2

n = 1

) of hydrogen-like iron ion (atomic number of iron is

26

) from the Perseus galaxy cluster. The wavelength of the line is closest to

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

In the discharge tube as the density of atom increases, the intensity of spectral lines

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The energy required to ionise a hydrogen like ion in its ground state is

9

Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state?

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The spectral line corresponding to a transition of an electron in $H -$ atom the first excited state to the ground state would appear in the

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

If an electron is moving in the

n^{th}

orbit of the hydrogen atom, then its velocity

(v_{n})

for the

n^{th}

orbit is given as:

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

R

is Rydberg constant then, the shortest wavelength of the Balmer series of the hydrogen atom is:

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The spectrum formed by an ordinary tubelight is a/an

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The wavelength of radiation emitted when an electron jumps from

5^{th}

excited state to

3^{rd}

excited state of a hydrogen atom is ________. Given. Planck's constant

= 6.625 \times 10^{- 34} J s

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

The shortest wave lengths of Paschen, Balmer and Lyman series are in the ratio

HARD

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

In hydrogen spectrum,

L_{α}

line arises due to transition of electron from the orbit

n = 3

to the orbit

n = 2

. In the spectrum of singly ionized helium, there is a line having the same wavelength as that of the

L_{α}

line of hydrogen. This is due to the transition of the electron from the orbit ______ to ________

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Hydrogen Spectrum

An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let

λ_{n}, λ_{g}

be the de Broglie wavelength of the electron in the

n^{t h}

state and the ground state respectively. Let

\land_{n}

be the wavelength of the emitted photon in the transition from the

n^{t h}

state to the ground state. For large n, (A, B are constants)

If the series limit frequency of Balmer series is νB, then the series limit frequency of the Brackett series is

Important Questions on Structure of Atoms and Nuclei

Learn and Prepare for any exam you want !

If the series limit frequency of Balmer series is $ν_{B}$ , then the series limit frequency of the Brackett series is