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8 O

Oxygen

Non-Metal
Atomic Mass
15.999 u
Density
1.141 g/cm³ (liquid at melting point)
Melting Point
-218.79 °C
Boiling Point
-182.96 °C
State
Gas
Discovery
1774

Discovery

Discovered by Carl Wilhelm Scheele and Joseph Priestley in 1774.

Common Uses

  • Used in medical therapies and respiratory support
  • Vital for combustion processes in industry
  • Applied in water treatment and metal cutting

Interesting Facts

  • Oxygen is essential for most life forms on Earth.
  • It makes up about 21% of Earth’s atmosphere.
  • Liquid oxygen is used as an oxidizer in rocket fuel.
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