An atom's emission of light with a specific amount of energy confirms that:

• A. electrons in the atom occupy quantized energy levels
• B. the atom emits light continuously across all wavelengths
• C. the atom contains only one type of element
• D. all electrons in the atom have the same energy

Answer: (A)

Verified step by step guidance

1. Understand that when an atom emits light, it does so by electrons transitioning between energy levels within the atom.
2. Recall that these energy levels are quantized, meaning electrons can only occupy specific, discrete energy states rather than a continuous range.
3. Recognize that the emission of light with a specific amount of energy corresponds to the difference between two quantized energy levels, resulting in light of a specific wavelength or frequency.
4. Note that if the atom emitted light continuously across all wavelengths, it would imply a continuous range of energy differences, which contradicts the concept of quantized energy levels.
5. Therefore, the observation of light emission at specific energies confirms that electrons in the atom occupy quantized energy levels.