Bohr’s Theory of Hydrogen Atom
Physics ⇒ Modern Physics
Bohr’s Theory of Hydrogen Atom starts at 11 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Bohr’s Theory of Hydrogen Atom.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
Describe the main limitation of Bohr’s model.
Explain the term ‘stationary orbits’ as used in Bohr’s model.
Explain why the electron does not spiral into the nucleus according to Bohr’s model.
Explain why the energy levels in hydrogen atom are negative according to Bohr’s theory.
State Bohr’s quantization condition for angular momentum.
State one experimental observation that could not be explained by Rutherford’s model but is explained by Bohr’s model.
State the formula for the energy of the nth orbit in hydrogen atom according to Bohr’s theory.
State the relationship between the energy difference of two orbits and the frequency of emitted photon in Bohr’s model.
According to Bohr’s theory, the speed of the electron in the first orbit of hydrogen atom is approximately: (1) 2.2 × 106 m/s (2) 3.0 × 108 m/s (3) 1.0 × 105 m/s (4) 1.6 × 107 m/s
The angular momentum of an electron in the third Bohr orbit is: (1) h/2π (2) 2h/2π (3) 3h/2π (4) 4h/2π
The energy of the electron in the ground state of hydrogen atom is: (1) 0 eV (2) -13.6 eV (3) -3.4 eV (4) 13.6 eV
The radius of the first Bohr orbit (n=1) for hydrogen is approximately: (1) 0.53 nm (2) 0.053 nm (3) 5.3 nm (4) 53 nm
According to Bohr’s theory, electrons in a hydrogen atom revolve around the nucleus in _______ orbits without radiating energy.
According to Bohr’s theory, the frequency of radiation emitted when an electron jumps from a higher energy orbit (n2) to a lower energy orbit (n1) is given by _______.
Fill in the blank: The quantum number n in Bohr’s theory is called the _______ quantum number.
If the principal quantum number n increases, the radius of the orbit _______.
True or False: According to Bohr’s theory, the energy of the electron in the nth orbit is negative.
True or False: According to Bohr’s theory, the frequency of revolution of the electron in the nth orbit increases with n.
True or False: The Bohr model assumes that the nucleus is stationary and infinitely massive compared to the electron.
True or False: The Bohr model can accurately predict the spectra of all multi-electron atoms.
