JEE Main Chemistry · Structure of Atom

Bohr Radius Calculation

Bohr Radius Calculation (Structure of Atom) was asked 5 times in 5 JEE Main shifts, 2017–2026, out of the 42 shifts Lumi analysed. 1 of the 5 had a numerical answer.

Times asked: 5; in 5 shifts
Years: 2017–2026
Usual format: Single correct; Calculation
Pattern: Frequent; repeats across shifts

How it is asked

Identify species with identical bohr radii
Identify species and level from bohr radius

Difficulty

Easy 5Medium 0Hard 0

Where it sits

Chapter: Structure of Atom. Topic: Bohr's Atomic Theory, 15 questions over 8 ideas.

All 5 questions

Newest first, each with its options and official answer.

4 Apr 2026, Shift 2 · Q52The species having identical radii according to the Bohr's theory are: A. H (first orbit) B. $\mathrm{He^+}$ (first orbit) C.…EasyOther
6 Apr 2026, Shift 2 · Q52The Bohr radius of a hydrogen like species is 70.53 pm. The species and the stationary state ( $n$ ) are respectively (Given : Hydrogen atom…EasySingle correct
2 Apr 2025, Shift 1 · Q52According to Bohr's model of hydrogen atom, which of the following statement is incorrect ?EasySingle correct
3 Aug 2021, Shift 2 · Q53The ratio of radii for the first and third orbits of hydrogen atom is $1 : x$ . The value of $x$ is $\underline{\hspace{2em}}$ . (Integer…EasyNumerical value
2 Apr 2017 (offline) · Q38The radius of the second Bohr orbit for hydrogen atom is : (Planck's Const. $h=6.6262\times10^{-34}$ Js; mass of electron…EasySingle correct