Answer :
Final answer:
Jupiter and Uranus are likely to retain hydrogen and helium in their atmospheres due to their mass and gravity. Titan and Pluto, on the other hand, do not have enough mass to retain these gases.
Explanation:
Hydrogen and helium are the lightest elements in the universe and are commonly found in the atmospheres of gas giant planets. The ability of a planet or moon to retain these gases depends on its mass, temperature, and distance from the Sun.
Jupiter, with a mass of 317.8 times that of Earth (ME) and located at a distance of 5.2 astronomical units (AU) from the Sun, has enough mass and gravity to hold onto hydrogen and helium in its atmosphere.
Uranus, with a mass of 14.5 ME and located at a distance of 19.2 AU from the Sun, also has sufficient mass and gravity to retain hydrogen and helium.
On the other hand, Titan, with a mass of 0.023 ME and located at a distance of 9.6 AU from the Sun, and Pluto, with a mass of 0.002 ME and located at a distance of 39.3 AU from the Sun, do not have enough mass to retain hydrogen and helium in their atmospheres.
Learn more about retention of hydrogen and helium in planetary atmospheres here:
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