# Rydberg atom

> English word · Noun

## Definitions
1. Any atom which has a single valence electron in a shell well outside any other electrons in the aton; approximates the hydrogen atom.

## Etymology
From Johannes Rydberg, Swedish physicist.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/rydberg-atom