How are the atmospheres on Jupiter and Saturn different than those on Uranus and Neptune?

The atmospheres of Jupiter and Saturn are made almost entirely of hydrogen and helium, although there is some evidence they contain hydrogen compounds. The there is Uranus and Neptune that are made primarily of hydrogen compounds, with smaller traces of hydrogen, helium, metal and rock.

Explanation:

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possibly, yes.

explanation:

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yes the answer is total mass in unchanged   : )