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Elements

Oxygen - O

The element Oxygen, atomic number 8, is formed from Type II supernova, which results from star core collapse.

      1. Name:
      2. Oxygen
      1. Symbol:
      2. O
      1. Atomic number (protons):
      2. 8
      1. How created:
      2. Type II supernova
      1. Process:
      2. star core collapse
      1. Group (column):
      2. 16
      1. Period (row):
      2. 2
      1. Atomic weight:
      2. 15.999000000
      1. Melting point:
      2. 54.36 K
      1. Boiling point:
      2. 90.2 K
      1. Density:
      2. 0.0014290 g/cm3

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