What is the concept of quantization?

Quantization is the process of restricting certain physical quantities, such as energy, angular momentum, or charge, to discrete, quantized values rather than allowing them to take on any continuous value. This concept arises from quantum mechanics and is a fundamental feature of the theory. For example, in the quantized energy levels of electrons in atoms, the angular momentum of electrons in orbitals, and the quantized charge of elementary particles. Quantization plays a crucial role in understanding the behavior of particles at the atomic and subatomic scales.