Rydberg atom

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Notion

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Science and technology

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What Wikipedia says

A Rydberg atom is an excited atom with one or more electrons that have a very high principal quantum number, n. The higher the value of n, the farther the electron is from the nucleus, on average. It is named after the Swedish physicist Johannes Rydberg.

Excerpt from the Wikipedia article “Rydberg atom”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Berndthaller, CC BY-SA 4.0, via Wikimedia Commons.