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Pronunciation varies by accent · noun
(chemistry) the carbocation, CH₅⁺, derived by the hydrogenation of methane.
Use methanium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Methanium means (chemistry) the carbocation, CH₅⁺, derived by the hydrogenation of methane.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use methanium where its definition matches the intended context.
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