Which of the following statement(s) is/are consistent with...

Which of the following statement(s) is/are consistent with the Bohr theory of the atom (and no others)? (1) An electron can remain in a particular orbit as long as it continuously absorbs radiation of a definite frequency. (2) The lowest energy orbits are those closest to the nucleus. (3) All electrons can jump from the $K$ shell to the $M$ shell by emitting radiation of a definite frequency. (a) $1,2,3$ (b) 2 only (c) 3 only (d) 1,2

Which of the following statement(s) is/are consistent with the Bohr theory of the atom (and no others)?
(1) An electron can remain in a particular orbit as long as it continuously absorbs radiation of a definite frequency.
(2) The lowest energy orbits are those closest to the nucleus.
(3) All electrons can jump from the $K$ shell to the $M$ shell by emitting radiation of a definite frequency.
(a) $1,2,3$
(b) 2 only
(c) 3 only
(d) 1,2

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Key Concepts

Quantization of Energy Levels

Energy levels in the Bohr model are quantized, meaning electrons can only exist in orbits with specific, discrete energy values. The orbit closest to the nucleus corresponds to the lowest energy, or ground, state, which is inherently more stable than higher energy orbits.

Bohr Model

The Bohr model is a theory of the atom that postulates electrons move in fixed, circular orbits around the nucleus, with each orbit corresponding to a specific energy level. This model was formulated to explain the discrete spectral lines of hydrogen and introduced the idea that not all orbits were allowed, but only those with quantized angular momentum.

Stationary States

In the Bohr model, the allowed electron orbits are known as stationary states. Electrons in these orbits do not emit radiation despite being in motion. Radiation is only emitted or absorbed when an electron transitions between these quantized states, meaning that continuous absorption or emission in a fixed orbit does not occur.

Electron Transitions

When electrons transition between these quantized energy levels, they do so by absorbing or emitting photons of definitive frequencies. The frequency of these photons is determined by the energy difference between the initial and final states, ensuring that only certain specific transitions are possible.

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