1: Non car oxygène représente un atome d’oxygène alors que dioxygène est une molécule.
2: L’oxygène
3: le dioxygène
4:
https://www.google.com/imgres?imgurl=https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2F5%2F57%2FOxygen_molecule.svg%2F170px-Oxygen_molecule.svg.png&imgrefurl=https%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FOxyg%25C3%25A8ne&tbnid=JALAjYJRpPHDLM&vet=12ahUKEwip9Zrq96HpAhVKLxoKHX3kAyAQMygAegUIARCLAg..i&docid=pJO_D2TTna3j4M&w=170&h=146&q=oxygene%20modele&ved=2ahUKEwip9Zrq96HpAhVKLxoKHX3kAyAQMygAegUIARCLAg
5:https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.maxicours.com%2Fse%2Fcours%2Frepresentation-des-atomes-et-des-molecules%2F&psig=AOvVaw2ZqnIWHNS-6mDfD66aGSiW&ust=1588947257520000&source=images&cd=vfe&ved=0CAIQjRxqFwoTCKCftfv3oekCFQAAAAAdAAAAABAN
