8
O
Oxygen
15.999 u
Oxygen
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周期
2
族
16
ブロック
p-ブロック
相 (STP)
Gas
Oxygen is the third most abundant element in the universe and essential for respiration. It makes up about 21% of Earth's atmosphere.
外観: 無色の気体（液体では淡青色）
Compounds Containing Oxygen
非金属 をもっと見る
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Frequently Asked Questions
What is Oxygen?
Oxygen (O) is a chemical element with atomic number 8. It is a gas at standard temperature and pressure, classified as a 非金属.
What are the key properties of Oxygen?
Oxygen has an atomic mass of 15.999 u, density of 0.001429 g/cm³, melting point of -218.8°C, boiling point of -183.0°C.
What is the electron configuration of Oxygen?
The electron configuration of Oxygen is [He] 2s2 2p4. It is in the p-block of the periodic table.
Who discovered Oxygen?
Oxygen was discovered by Carl Wilhelm Scheele in 1771.
What is the electronegativity of Oxygen?
Oxygen has an electronegativity of 3.44 on the Pauling scale.