Home › ICSE Class 8 › chemistry › Structure of Atom › Bohr improved the atom model by proposing that e…
Bohr improved the atom model by proposing that electrons revolve in
AStraight lines toward the nucleus
BA plum-pudding of positive matter
CRandom paths inside the nucleus
DFixed energy shells around the nucleus
Answer & Solution
Correct answer: D. Fixed energy shells around the nucleus
1. Rutherford's electron paths would lose energy and crash into the nucleus.
2. Bohr proposed quantised, fixed-energy shells (orbits).
3. Electrons in these shells do not radiate energy.
4. So option A is correct.
_Source: Selina Concise Chemistry Class 8, Ch on Structure of Atom (Mistral OCR'd PDF), section on Bohr's model_
Related questions
An electron and a proton have the same kinetic energy. Which has the larger de Broglie wavHund's rule states that for degenerate orbitals of a subshell, electronsThe Aufbau principle states that electrons fill atomic orbitalsThe four quantum numbers (n, l, m_l, m_s) fully specify an electron in an atom. The magnetHeisenberg's uncertainty principle statesThe de Broglie wavelength associated with a particle of mass m and velocity v isFor a hydrogen-like ion of atomic number Z, the energy of the nth level isThe relationship E = hν (Planck) between photon energy and frequency contains constant h t