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Jupiter and Saturn share the Sun's chemical makeup. Hydrogen makes up what part of their mass?
A75 percent
B90 percent
C10 percent
D25 percent
Answer & Solution
Correct answer: A. 75 percent
1. Helium takes the remaining quarter.
2. Hydrogen dominates by far.
3. It is 75 percent.
_Source: OpenStax Astronomy 2e, Chapter 7, Other Worlds: an Introduction to the Solar System._
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