What does it mean to say that something is quantized?

Electrons are quantized in their orbits. This means that they can change energy levels but only if the right quantum of energy comes along. They will accept the quantum of energy if it is the right amount to allow them to make the jump to the next energy level. They will ignore the quantum of energy if it is too much or too little.

http://hyperphysics.phy-astr.gsu.edu/Hbase/bohr.html

To say that something is quantized means that it is divided or measured in discrete, distinct units. In other words, it implies that the quantity or property being considered can only take certain specific values, rather than any possible value within a continuous range. This concept is often encountered in various scientific fields, such as physics and computer science.

For example, in physics, the idea of quantization is central to quantum mechanics. It states that certain physical quantities, such as energy or angular momentum, can only exist in discrete amounts, known as quanta. This implies that these quantities can only exist in specific, well-defined levels or states.

To understand quantization further, consider the analogy of a staircase. In a continuous system, you could be at any point on the staircase, as it allows for infinite positions. However, in a quantized system, you can only be at specific steps of the staircase, and no intermediate position is possible.

To determine if something is quantized, you can look for evidence of discrete, non-continuous behavior, such as a distinct step-like pattern or only specific allowed values for a given property or quantity.