Q33.If the radius of first orbit of H atom is a0 , the deBroglie wavelength of an electron in the third orbit is (1) 4πa0 (2) 8πa0 (3) 6πa0 (4) 2πa0
What This Question Tests
This question combines the concepts of Bohr's model for the radius of an orbit in a hydrogen atom and de Broglie's hypothesis relating the wavelength of an electron to the circumference of its orbit.
Concepts Tested
Formulas Used
2πr = nλ
rn = a0 * n^2 / Z
📚 NCERT Sections This Tests
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.
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.
📋 Question Details
- Chapter
- Atomic Structure
- Topic
- Bohr's model and de Broglie wavelength
- Year
- 2012
- Shift
- 12 May Online
- Q Number
- Q33
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 2: Structure of Atom
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