Oxygen (O) Properties and Facts

Element 8 - Nonmetal

What are the basic properties of Oxygen?

Oxygen (symbol: O) is a nonmetal with atomic number 8. Its atomic mass is 15.999 u, and it belongs to period 2 and group 16.

What is the electron configuration of Oxygen?

The electron configuration is: 1s² 2s² 2p⁴

What are the physical properties of Oxygen?

Melting point: 54.36 K
Boiling point: 90.2 K
Density: 0.001429 g/cm³

What are the known isotopes of Oxygen?

  • O-16: 99.757% abundance
  • O-17: 0.038% abundance
  • O-18: 0.205% abundance

What is the biological role and occurrence of Oxygen?

Biological role: Essential for cellular respiration in most life forms
Natural occurrence: Makes up 21% of Earth's atmosphere, abundant in Earth's crust

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