quantum number

noun

Definition of quantum number 

: any of a set of numbers that indicate the magnitude of various discrete quantities (such as electric charge) of a particle or system and that serve to define its state

Examples of quantum number in a Sentence

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Middle Sister prattled on about how an atom having six principal quantum numbers can yield several emission lines, or some such. Chicago Tribune, chicagotribune.com, "Algren Award runner-up: "Most Best Happy Korean Bright Star" by Michelle Massie," 2 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quantum number.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of quantum number

1902, in the meaning defined above

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The first known use of quantum number was in 1902

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