8

O

Oxygen

15.999

Nonmetal
Gas

Discovery

Priestley, Joseph & Scheele, Carl Wilhelm (1774)

Etymology

Greek via French

Meaning

To bring forth acid

Electron configuration

Electron configuration

Crystal structure

Crystal structure

Simple cubic

Physical Properties

Phase

  (at 21 °C and 101.325 kPa)

Gas

Melting point

  (at 101.325 kPa)

-218.0 °C

55.15 K

Boiling point

  (at 101.325 kPa)

-183.0 °C

90.15 K

Density

  (at 21 °C and 101.325 kPa)

1.43 g/cm3

Electronegativity

3.44