quantized level

atomic physics

Also known as: quantum level, quantum state

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

July 13, 2026

Quick Summary

In atomic physics, the concept of quantization means that certain physical properties, like energy, can only exist in discrete, specific values rather than a continuous range. Electrons in an atom orbit the nucleus in specific "allowed orbits" or energy levels, much like steps on a staircase. Electrons can transition between these levels by absorbing or emitting a precise amount of energy, often in the form of a photon. This process is known as a quantum leap or jump.1234

The specific energy levels an atom's electrons can occupy are unique to each element, acting as a fingerprint that can be identified through spectroscopy. This quantization is a fundamental principle of quantum mechanics, which governs the behavior of subatomic particles.3567

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

10 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

- hyperfine structure
  …and they are then called quantized levels. Thus, when the atoms of an element radiate energy, transitions are made between these quantized energy levels, giving rise to hyperfine structure.
  Read More
  …and they are then called quantized levels. Thus, when the atoms of an element radiate energy, transitions are made between these quantized energy levels, giving rise to hyperfine structure.
  Read More