oxidation state


Definition of oxidation state

: a positive or negative number that represents the effective charge of an atom or element and that indicates the extent or possibility of its oxidation the usual oxidation state of sodium is +1 and of oxygen −2

called also oxidation number

Examples of oxidation state in a Sentence

Recent Examples on the Web In addition, the vanadium ions can change their oxidation state during this process as well. John Timmer, Ars Technica, 4 Sep. 2020 The color depends on the oxidation state of the iron atom bound to the muscle. Popular Science, 1 Jan. 2019

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

First Known Use of oxidation state

1928, in the meaning defined above

Keep scrolling for more

Learn More About oxidation state

Time Traveler for oxidation state

Time Traveler

The first known use of oxidation state was in 1928

See more words from the same year

Dictionary Entries Near oxidation state


oxidation state

oxidative phosphorylation

See More Nearby Entries 

Statistics for oxidation state

Cite this Entry

“Oxidation state.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oxidation%20state. Accessed 24 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about

More from Merriam-Webster on oxidation state

Britannica.com: Encyclopedia article about oxidation state


Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
True or False

Test your knowledge - and maybe learn something along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!