EASYMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryAtomic StructureIntro
The Bohr orbit radius for hydrogen atom (n = 1) is 0.529 Å. The radius for the first excited state (n = 2) orbit is
0.0.13 Å
1.1.06 Å
2.4.77 Å
3.2.12 Å
Explanation
rₙ = 0.529 n²/Z Å. For n=2, Z=1: r₂ = 0.529 × 4 = 2.12 Å
Practice More Like This
Take chapter-wise tests, track your progress, and master Atomic Structure.
Start Free Practice →