Q27.A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength 980Ã …. The radius of the atom in the excited state, in terms of Bohr radius a0 , will be: (1) 25a0 (2) 9a0 (3) 16a0 (4) None of the above JEE Main 2019 (11 Jan Shift 1) JEE Main Previous Year Paper
What This Question Tests
This question involves calculating the energy of an absorbed photon, determining the final principal quantum number (n) of the excited hydrogen atom, and then finding its radius.
Concepts Tested
Formulas Used
E = hc/λ
E_n = -13.6/n^2 (eV)
ΔE = E_final - E_initial
r_n = n^2 a₀
📚 NCERT Sections This Tests
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
12.7 — The Radius Of The Innermost Electron Orbit Of A Hydrogen Atom Is
Physics Class 12 · Chapter 12
12.7 The radius of the innermost electron orbit of a hydrogen atom is 5.3×10–11 m. What are the radii of the n = 2 and n =3 orbits?
12.6 — (A) Using The Bohr’S Model Calculate The Speed Of The Electron In A
Physics Class 12 · Chapter 12
12.6 (a) Using the Bohr’s model calculate the speed of the electron in a hydrogen atom in the n = 1, 2, and 3 levels. (b) Calculate the orbital period in each of these levels.
📋 Question Details
- Chapter
- Atoms
- Topic
- Bohr Model of Hydrogen Atom
- Year
- 2019
- Shift
- 11 Jan Shift 1
- Q Number
- Q27
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 12: Atoms
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