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Atomic Structure and X-rays questions with solutions
Practice Atomic Structure and X-rays for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
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- NumericmediumAtomic Structure and X-rays
A large collection of ground-state hydrogen atoms absorbs monochromatic photons of energy 12.75 eV, exciting the electrons to the fourth Bohr orbit. The atoms subsequently de-excite through all possible paths. Find the maximum number of distinct emitted wavelengths.
JEE MainsNEETJEE Advanced
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Using the Bohr model, let B₂ and B₄ be the magnetic fields at the nucleus produced by the orbital motion of the electron in the second and fourth Bohr orbits of a hydrogen atom, respectively. Find B₂ ÷ B₄.
JEE Mains 2026 2 April Evening Shift
Open question & full solution → - A/RmediumAtomic Structure and X-rays
Choose the correct option for the following Assertion (A) and Reason (R).
Assertion
For two consecutive elements, the difference between the square roots of their Kα frequencies is approximately constant in the simple Moseley model.
Reason
In the simple screening approximation for the Kα series, Moseley's law can be written as √ν(Kα) = A(Z-1), where A is constant for that series.
Options
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Open question & full solution → - NumericmediumAtomic Structure and X-rays
Two Rutherford scattering measurements are made. In experiment A, α-particles of kinetic energy 5 MeV scatter from a foil of atomic number 40 and are detected at 60°. In experiment B, α-particles of kinetic energy 10 MeV scatter from a foil of atomic number 80 and are detected at 120°. All other factors are identical. If the count-rate ratio N(A) ÷ N(B) is N, find N.
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Open question & full solution → - MCQeasyAtomic Structure and X-rays
A hydrogen atom has its electron initially in the fourth Bohr orbit. It directly returns to the second orbit and emits one photon. To which spectral series does this photon belong?
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An X-ray tube is first operated at an accelerating potential of 25 kV and then at 50 kV. The target material, filament current and all geometrical conditions are unchanged. If the ratio of the first cutoff wavelength to the second cutoff wavelength is N, find N.
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Open question & full solution → - NumericmediumAtomic Structure and X-rays
A hydrogen atom is initially in its ground state and absorbs a photon of energy 10.2 eV. Assuming the photon is absorbed completely and the atom remains bound, find the principal quantum number N of the excited state reached by the electron.
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Open question & full solution → - NumericmediumAtomic Structure and X-rays
A hydrogen atom initially in its ground state absorbs a photon of energy 12.75 eV. The photon is exactly resonant with a bound-state excitation. If the electron reaches the Nth Bohr orbit, find N.
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Open question & full solution → - NumericmediumAtomic Structure and X-rays
A large collection of hydrogen atoms is initially prepared in the fourth Bohr orbit and subsequently emits all possible photons while returning to lower levels. Take hc = 1240 eV·nm. If the maximum emitted wavelength is approximately N nm, find N to the nearest integer.
JEE MainsNEETJEE Advanced
Open question & full solution → - NumericmediumAtomic Structure and X-rays
Hydrogen atom is bombarded with electrons accelerated through a potential different of V, which causes excitation of hydrogen atoms. If the experiment is being formed at T = 0 K. The minimum potential difference needed to observe any Balmer series lines in the emission spectra will be V = α/10, where α = ________.
JEE Mains 2024 29 Jan Evening Shift
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