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

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Important Questions on Atoms

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Physics>Modern Physics>Atoms>Atomic Spectra
In an X-ray tube, electrons emitted from a filament (cathode) carrying current I hit a target (anode) at a distance d from the cathode. The target is kept at a potential V higher than the cathode resulting in emission of continuous and characteristic X-rays. If the filament current I is decreased to I2, the potential difference V is increased to 2V, and the separation distance d is reduced to d2, then
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let λn, λg be the de Broglie wavelength of the electron in the nth state and the ground state respectively. Let ∧n be the wavelength of the emitted photon in the transition from the nth state to the ground state. For large n, (A, B are constants)
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
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?
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The series corresponding to lowest wavelength transition in H - atom.
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
An electron in a Hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths λ1:λ2 emitted in the two cases is,
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Physics>Modern Physics>Atoms>Atomic Spectra
W. K. Roentgen discovered
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Physics>Modern Physics>Atoms>Atomic Spectra
A He+ ion is in its first excited state. Its ionization energy is:
HARD
Physics>Modern Physics>Atoms>Atomic Spectra
The Hitomi satellite recently observed the Lyman alpha emission line (n=2 to 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
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
An electron beam is accelerated by a potential difference V to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If λmin is the smallest possible wavelength of X-ray in the spectrum, the variation of logλmin with logV is correctly represented in :
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The ratio of wavelengths of the last line of the Balmer series and the last line of the Lyman series is_____.
HARD
Physics>Modern Physics>Atoms>Atomic Spectra
In hydrogen spectrum, Lα 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 Lα line of hydrogen. This is due to the transition of the electron from the orbit ______ to ________
HARD
Physics>Modern Physics>Atoms>Atomic Spectra
The radius of the orbit of an electron in a Hydrogen-like atom is 4.5 a0, where a0 is the Bohr radius. Its orbital angular momentum is 3 h 2 π . It is given that h is Planck's constant and R is Rydberg constant. The possible wavelengths, when the atom de-excites, is (are)
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
A hydrogen atom is in a state with energy -1.51eV. In the Bohr model, the angular momentum of the electron in the atom with respect to an axis at the nucleus, is h2π=1.05×10-34 J s
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Physics>Modern Physics>Atoms>Atomic Spectra
12 eV energy is given to electron in third orbit of H-atom, then final energy of electron when it ionise from third orbit, is
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Physics>Modern Physics>Atoms>Atomic Spectra
Hydrogen atom in its ground state is excited by a monochromatic light of energy 13.06eV. The longest wavelength among the spectral lines is (Ionization energy of hydrogen atom is 13.6eV)
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The amount of energy required to separate a hydrogen atom into a proton and an electron is
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
The shortest wave lengths of Paschen, Balmer and Lyman series are in the ratio
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Physics>Modern Physics>Atoms>Atomic Spectra
If the series limit frequency of the Lyman series is VL, then the series limit frequency of the Pfund series is:
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is:
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The energy required to remove the electron from a singly ionized Helium atom is 2.2 times the energy required to remove an electron from helium atom. The total energy required to ionize the Helium atom completely is close to