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Because each oxygen molecule has two oxygen atoms, it is written with a \[2\] . Note: We breathe diatomic oxygen molecules, which are made up of only two oxygen atoms.
The name “oxygen” comes from the Greek words “oxy” (meaning sharp or acid) and “genes” (meaning producer). It was named by Antoine Lavoisier, a French chemist, in the late 18th century.
Lavoisier recognized oxygen as a key component of acids, and he observed that it is necessary for combustion and respiration. He proposed the name “oxygen” because he believed it was the essential component that produced acids (which at that time were defined as substances containing oxygen).
Therefore, the name “oxygen” reflects its chemical properties and its role in the formation of acids as understood during the early days of chemistry.