Which of the following is an aspect covered by Bohr's atomic model?

• A. Electrons move in elliptical orbits around the nucleus.
• B. Electrons exist in probability clouds called orbitals.
• C. Atoms are indivisible and cannot be broken down further.
• D. Electrons occupy specific, quantized energy levels around the nucleus.

Answer: (D)

Verified step by step guidance

1. Recall that Bohr's atomic model was developed to explain the stability of atoms and the discrete lines observed in atomic spectra, particularly for hydrogen.
2. Understand that Bohr proposed electrons move in fixed, circular orbits around the nucleus, each orbit corresponding to a specific energy level.
3. Recognize that these energy levels are quantized, meaning electrons can only occupy certain allowed energy states and not the spaces in between.
4. Note that Bohr's model does not describe electrons moving in elliptical orbits or existing as probability clouds; these ideas come from later quantum mechanical models.
5. Therefore, the key aspect of Bohr's model is that electrons occupy specific, quantized energy levels around the nucleus.