Plural of ethene, referring to multiple instances or types of the gas ethene or ethylene with a double carbon bond.
From ethene (ethyl + -ene) + plural -s. This plural form follows standard English rules for making chemical names plural.
While chemists mostly talk about 'ethene' as a single compound, the plural form reminds us that alkene chemistry is vast—there are ethene, propene, butene, and thousands more molecules with double bonds!
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