Homogeneous systems from interstellar space to planetary atmospheres and primitive soup models

1 Homogeneous Systems From Interstellar Space to Planetary Atmospheres and Primitive Soup Models 

Two atoms Three atoms Four atoms Five atoms Six atoms Seven atoms Eight or more atoms 

Subsequent thermal reactions generate higher quantities of atomic hydrogen (equations 8.6-8.7), the recombination of which at thermospheric pressure is extremely improbable [9]  

These reactions supply atomic hydrogen to lower parts of atmospheres and thus initiate numerous reactions of carbon, oxygen, and nitrogen species. The most important are the reactions with methane (equations 8.8-8.10), which finally yield 

Methane itself is also photochemically active below 145nm [9]  

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