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]
Bohr model and its limitations
Every question from past board papers on Bohr model and its limitations, newest paper first. Open any question for its full worked answer.
NEET UG 2025 question paper (official, booklet 45)
Full paper →NEET UG 2024 question paper (official, booklet S6)
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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 2022 question paper (official, booklet R6)
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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 2019 question paper (official, booklet P1)
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Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region ?