Final answer:
Energy levels in atoms are an example of a quantized physical entity, where electrons can only occupy specific and discrete values based on quantum mechanics.
Step-by-step explanation:
An example of a physical entity that is quantized is the energy levels in atoms. These energy levels only appear in certain discrete values, meaning an electron in an atom can only occupy specific energy levels, which are quantized and cannot have just any value.
The limits on these values are defined by the quantization rules of quantum mechanics, which states that energy is not continuous but comes in small but discrete chunks.
Energy levels in atoms is an example of a physical entity that is quantized. In atoms, electrons are located in specific energy levels or shells, and they can only have certain discrete values of energy. These energy levels have specific limits, and the energy of an electron can only take on these discrete values within those limits.