What did the Bohr model help us understand about an atom?

What did the Bohr model help us understand about an atom?

• A. Electrons moving between orbits, with absorption or emission of energy.
• B. Electrons orbit the nucleus with no energy changes.
• C. Atoms are solid spheres with no substructure.
• D. Energy levels are continuous.

Answer: (A)

Electrons in the Bohr model occupy specific, quantized energy levels and travel in fixed orbits around the nucleus. When an electron jumps from one level to another, it must absorb or emit a photon whose energy equals the difference between those levels. This link between discrete energy differences and light explains why atoms produce sharp spectral lines rather than a continuous spectrum. The model thus shows that atomic energy is quantized and that energy changes occur during transitions. In contrast, ideas of electrons moving with no energy changes, atoms as solid spheres with no substructure, or energy levels that are continuous don’t fit this framework.

Electrons in the Bohr model occupy specific, quantized energy levels and travel in fixed orbits around the nucleus. When an electron jumps from one level to another, it must absorb or emit a photon whose energy equals the difference between those levels. This link between discrete energy differences and light explains why atoms produce sharp spectral lines rather than a continuous spectrum. The model thus shows that atomic energy is quantized and that energy changes occur during transitions. In contrast, ideas of electrons moving with no energy changes, atoms as solid spheres with no substructure, or energy levels that are continuous don’t fit this framework.