If Uranus and Neptune had formed at their present distances from the Sun, we might expect that their properties would be quite different from what they are now. Which one of the following would NOT be a good description of Uranus and Neptune in this case?
A)They would contain a larger percentage of hydrogen and helium.
B)They would be smaller than their present sizes.
C)Their densities would be larger than their present values.
D)Their compositions would include liquid metallic hydrogen.

Question

Quizplus · Accepted Answer

If Uranus and Neptune had formed at their present distances from the Sun, the colder environment would have allowed them to capture more hydrogen and helium, making them larger and less dense, but not necessarily leading to the formation of liquid metallic hydrogen, which requires extremely high pressures that are more characteristic of the larger gas giants like Jupiter and Saturn.

If Uranus and Neptune Had Formed at Their Present Distances