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Atmospheric origi1 - Atmospheric origin If water were...

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Atmospheric origin If water were acquired by local accretion it would mainly be in hydrated form, as seen in meteorites. N,C, O and H would be acquired in complex carbohydrates, and smallex carbohydrates, and small amounts of C and N "dissolved" in the metallic Fe phase. Some water would be derived from reduced hydrogen from organic compounds. As the planetisimals were forming and accretion taking place, the early sun would be "burning off" the volatile material near the sun, but material deflected by Earth and Venus would tend to homogenize the inner solar system. If accretion of volatiles was from bodies further out than the terrestrial bodies, this would require deflection inwards due to resonances with Jupiter and Saturn and other interactions further out. If the material that arrived was then asteroidal in type, then the water would be in hydrated form (with maybe some water from ice if the material was from far enough out) and C and N from organic molecules. In all cases you would expect the terrestrial planets all to have similar
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