which element has the chemical symbol o
Oxygen is the element with the chemical symbol O.
This nonmetal gas, atomic number 8, makes up about 21% of Earth's atmosphere and is vital for respiration and combustion.
Key Properties
- Atomic Mass : 15.999 u
- Melting Point : -218.4°C; Boiling Point : -183.0°C
- Group : Chalcogen (Group 16); colorless, odorless at room temperature
Quick Facts
- Discovered in 1774 by Joseph Priestley and Carl Wilhelm Scheele
- Most abundant element in Earth's crust (~46%)
- Forms O₂ molecule naturally
Bottom TL;DR : The element with symbol O is Oxygen —essential for life, confirmed across periodic tables and science sources.
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