The word "methene" can be spelled using the International Phonetic Alphabet (IPA) as /ˈmɛθiːn/. The IPA helps to accurately represent the sounds of the word. The first syllable is pronounced with a short "e" sound, followed by a "th" sound and a long "e" sound for the second syllable. The final syllable ends with a nasal "n" sound. Methene is a hydrocarbon that consists of a single carbon atom and two hydrogen atoms, often used in organic chemistry.