Energy levels are defined as

Energy levels are defined as

• A. The shell in which an electron moves around the nucleus.
• B. The possible energies that electrons in an atom can have; associated to electron orbits.
• C. The distance between the nucleus and an electron.
• D. The type of chemical bond formed.

Answer: (B)

Energy levels are the discrete energies that electrons in an atom can possess. They correspond to the different orbitals the electron can occupy around the nucleus, and electrons move between these levels by absorbing or emitting photons with energy equal to the difference between the levels. This quantization explains why atoms show specific spectral lines. It’s about possible energies, not precise distances from the nucleus, and not about the kind of chemical bond formed. The distance or radius is not the defining feature, and bonding depends on how electrons are shared or transferred, not on the energy levels themselves.

Energy levels are the discrete energies that electrons in an atom can possess. They correspond to the different orbitals the electron can occupy around the nucleus, and electrons move between these levels by absorbing or emitting photons with energy equal to the difference between the levels. This quantization explains why atoms show specific spectral lines. It’s about possible energies, not precise distances from the nucleus, and not about the kind of chemical bond formed. The distance or radius is not the defining feature, and bonding depends on how electrons are shared or transferred, not on the energy levels themselves.