Atomic Number of Oxygen

Oxygen Atomic Number

Atomic Number of Oxygen is 8.

Chemical symbol for Oxygen is O. Number of protons in Oxygen is 8. Atomic weight of Oxygen is 15.999 u or g/mol. Melting point of Oxygen is -218,4 °C and its the boiling point is -182,9 °C.

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About Oxygen

Oxygen is one of the fundamental and essential elements for all living creatures on our planet. It occurs in atmosphere in the form of gas without color and odor, as well as one of the two chemical elements in the molecules of water. The name of the element comes from the Greek words meaning acid forming. One more important property of oxygen is creating combustion, or making burning possible. This chemical element has plenty of usages, including welding, steel producing, producing other chemical compounds. Oxygen plays an important role in water purification, as well as is used in medicine, rocket engines production, and so on.

Properties of Oxygen Element

Atomic Number (Z)8
Atomic SymbolO
Atomic Weight15.999 u
Density0.001429 g/cm3
Melting Point (K)54.36 K
Melting Point (℃)-218,4 °C
Boiling Point (K)90.2 K
Boiling Point (℃)-182,9 °C
Heat Capacity0.918 J/g · K
Abundance461000 mg/kg
State at STPGas
Electronegativity (Pauling) χ3.44
Ionization Energy (eV)13.61806
Atomic Radius60pm
Covalent Radius73pm
Van der Waals Radius152
Valence Electrons6
Year of Discovery1774
DiscovererPriestley and Scheele

What is the Boiling Point of Oxygen?

Oxygen boiling point is -182,9 °C. Boiling point of Oxygen in Kelvin is 90.2 K.

What is the Melting Point of Oxygen?

Oxygen melting point is -218,4 °C. Melting point of Oxygen in Kelvin is 54.36 K.

How Abundant is Oxygen?

Abundant value of Oxygen is 461000 mg/kg.

What is the State of Oxygen at Standard Temperature and Pressure (STP)?

State of Oxygen is Gas at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Oxygen Discovered?

Oxygen was discovered in 1774.