Final answer:
A monoterpene contains 10 carbon atoms, which are derived from two isoprene units. Examples of monoterpene include limonene, pinene, and camphene.
Step-by-step explanation:
A monoterpene is a type of terpene that contains two isoprene units, which are five-carbon precursors. Since each isoprene unit contains five carbons, a monoterpene would have a total of 10 carbon atoms. For example, limonene is a monoterpene that contains two isoprene units, so it has 10 carbon atoms. Other examples of monoterpene include pinene and camphene.