monatomic
Americanadjective
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having one atom in the molecule.
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containing one replaceable atom or group.
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having a valence of one.
adjective
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(of an element) having or consisting of single atoms
argon is a monatomic gas
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(of a compound or molecule) having only one atom or group that can be replaced in a chemical reaction
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a less common word for monovalent
Other Word Forms
Etymology
Origin of monatomic
Vocabulary lists containing monatomic
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Read the labels of several commercial products and identify monatomic ions of at least six main group elements contained in the products.
From Textbooks ● Feb. 14, 2019
The oxidation number of a monatomic ion is equal to the ion’s charge.
From Textbooks ● Feb. 14, 2019
For example, the pure metalloids form covalent crystals like the nonmetals, but like the metals, they generally do not form monatomic anions.
From Textbooks ● Feb. 14, 2019
The noble gases are all monatomic, whereas the other nonmetal gases—hydrogen, nitrogen, oxygen, fluorine, and chlorine—normally exist as the diatomic molecules H2, N2, O2, F2, and Cl2.
From Textbooks ● Feb. 14, 2019
Its ratio of specific heats has very nearly the ideal value 1.666, appropriate to a monatomic molecule.
From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" by Various
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