The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes \(n=2 \to n=3\) and \(n=4 \to n=6\) transitions, respectively, is
Atomic Structure
Every question from past board papers on Atomic Structure, newest paper first. Open any question for its full worked answer.
NEET UG 2025 question paper (official, booklet 45)
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Energy and radius of first Bohr orbit of \(\mathrm{He^+}\) and \(\mathrm{Li^{2+}}\) are
[Given \(R_H = 2.18\times10^{-18}\) J, \(a_0 = 52.9\) pm]
NEET UG 2024 question paper (official, booklet S6)
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Match List I with List II.
List I (Quantum Number): A. \(m_l\) B. \(m_s\) C. \(l\) D. \(n\)
List II (Information provided): I. shape of orbital II. size of orbital III. orientation of orbital IV. orientation of spin of electron
Choose the correct answer from the options given below:
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The energy of an electron in the ground state (n = 1) for \(He^+\) ion is \(-x\) J, then that for an electron in n = 2 state for \(Be^{3+}\) ion in J is :
NEET UG 2023 question paper (official, booklet G6)
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Select the correct statements from the following :
A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is \(9.10939 \times 10^{-31}\) kg.
C. All the isotopes of a given element show same chemical properties.
D. Protons and electrons are collectively known as nucleons.
E. Dalton's atomic theory, regarded the atom as an ultimate particle of matter.
Choose the correct answer from the options given below :
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The relation between n\(_m\), (n\(_m\) = the number of permissible values of magnetic quantum number (m)) for a given value of azimuthal quantum number (\(l\)), is
NEET UG 2022 question paper (official, booklet R6)
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Identify the incorrect statement from the following.
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If radius of second Bohr orbit of the \(He^+\) ion is 105.8 pm, what is the radius of third Bohr orbit of \(Li^{2+}\) ion ?
NEET UG 2021 question paper (official, booklet M4)
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Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures :
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A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light, c=\(3.0\times10^8\) ms\(^{-1}\)]
NEET UG 2019 question paper (official, booklet P1)
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4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
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Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region ?
NEET UG 2018 question paper (official, booklet EE)
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Which one is a wrong statement ?
NEET UG 2017 question paper (official, booklet B)
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Which one is the wrong statement ?
NEET UG 2016 Phase 1 question paper (official, booklet A)
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Two electrons occupying the same orbital are distinguished by :
NEET UG 2016 Phase 2 question paper (official, booklet ZZ)
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Which of the following pairs of \(d\)-orbitals will have electron density along the axes?
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How many electrons can fit in the orbital for which \(n = 3\) and \(l = 1\)?