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Elements

Argon - Ar

The element Argon, atomic number 18, is formed from Type II supernova, which results from star core collapse.

      1. Name:
      2. Argon
      1. Symbol:
      2. Ar
      1. Atomic number (protons):
      2. 18
      1. How created:
      2. Type II supernova
      1. Process:
      2. star core collapse
      1. How created (secondary):
      2. Type Ia supernova
      1. Process (secondary):
      2. white dwarf explosion
      1. Group (column):
      2. 18
      1. Period (row):
      2. 3
      1. Atomic weight:
      2. 39.950000000
      1. Melting point:
      2. 83.8 K
      1. Boiling point:
      2. 87.3 K
      1. Density:
      2. 0.0017837 g/cm3

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