Suppose the solar nebula had cooled much more before the solar wind cleared away the remaining gas. in that case, the terrestrial planets likely would have ended

with a higher abundance of hydrogen compounds and larger size

Explanation:

Suppose the solar nebula had cooled much more before the solar wind cleared away the remaining gas. In that case, the terrestrial planets likely would have ended up with a higher abundance of hydrogen compounds and larger size. Though during the formation of the planets there were abundant fractions of hydrogen and helium but due to the high temperature around the terrestrial planets the hydrogen gases were not able to condense on the terrestrial planets resulting in lower abundance of hydrogen compounds in the terrestrial planets when compared to other planets where the temperature allows hydrogen gas to condense before the solar wind cleared the remaining gas. For more information you can read about the formation of the solar system and nebula hypothesis

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