Bohr's atomic model differed from Rutherford's because it explained that:

• A. electrons are embedded within a positively charged sphere
• B. atoms are indivisible and cannot be broken down further
• C. electrons occupy specific energy levels and orbit the nucleus without radiating energy
• D. the nucleus contains both protons and neutrons

Answer: (C)

Verified step by step guidance

1. Understand the key difference between Rutherford's and Bohr's atomic models. Rutherford proposed a nucleus with electrons around it but could not explain why electrons do not spiral into the nucleus.
2. Recall that Bohr introduced the idea that electrons occupy specific, quantized energy levels or orbits around the nucleus, which prevents them from losing energy and collapsing into the nucleus.
3. Recognize that Bohr's model explains the stability of atoms by stating that electrons can only exist in certain allowed orbits without radiating energy, unlike classical physics predictions.
4. Note that the other options are incorrect because: electrons embedded in a positive sphere refers to the earlier plum pudding model, atoms being indivisible is disproven by subatomic particles, and the presence of neutrons in the nucleus was discovered after Bohr's model.
5. Conclude that the correct distinguishing feature of Bohr's model is the concept of electrons occupying specific energy levels and orbiting the nucleus without radiating energy.