Dioxygen: meaning, definitions and examples
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dioxygen
[daɪˈɒksɪdʒən ]
Definition
Context #1 | Noun
chemical compound
Dioxygen is a molecule composed of two oxygen atoms, commonly represented as O2. It is a diatomic molecule essential for the respiration of most living organisms on Earth and plays a crucial role in various chemical processes, including combustion and oxidation.
Synonyms
Examples of usage
- Plants convert dioxygen back into carbon dioxide during nighttime.
- Dioxygen supports aerobic respiration in animals.
- The combustion of hydrocarbons produces dioxygen as a byproduct.
Interesting Facts
Etymology
- The term 'dioxygen' comes from the Greek roots 'dyo' meaning 'two' and 'oxygen' meaning 'acid-forming', originally named due to its role in acid formation.
- It was first identified as a distinct chemical entity in the late 18th century by the scientist Antoine Lavoisier.
Science
- Dioxygen is the most abundant molecule in the Earth's atmosphere, making up about 21% of it.
- It plays a key role in cellular respiration, where living organisms use it to convert food into energy.
- In its liquid form, dioxygen can reach temperatures as low as -183°C, and is used as a propellant for rockets.
History
- The discovery of dioxygen greatly changed medicine and biology, leading to a better understanding of human respiration.
- In the 19th century, scientists like John Dalton and Amedeo Avogadro studied gases including dioxygen, which advanced the science of chemistry.
Environmental Science
- Photosynthesis in plants produces dioxygen as a byproduct, key for supporting life on Earth.
- Dioxygen is crucial for combustion, which powers many engines and machines, but can also contribute to pollution if not managed.
Pop Culture
- Dioxygen is often referenced in science fiction stories as an essential component for alien lifeforms that depend on Earth's air.
- Songs and movies sometimes celebrate the importance of breathing and freshness, metaphorically linking them to dioxygen.