Final answer:
True, both Jupiter and Saturn possess liquid metallic hydrogen, with Jupiter having a greater part of its interior composed of this unique substance, while Saturn has a smaller volume due to its lesser mass.
Step-by-step explanation:
The giant planets Jupiter and Saturn are primarily composed of hydrogen and helium. In their atmospheres, hydrogen and helium are gases; however, in the massive interiors of these planets, the enormous pressure leads to hydrogen becoming a liquid. As you venture deeper, the pressure and density increase to a point where hydrogen begins to exhibit metallic properties. This liquid metallic hydrogen generates a large portion of Jupiter's interior. Despite being less massive, Saturn does contain a small volume of liquid metallic hydrogen.
However, because of its smaller mass compared to Jupiter, most of Saturn's interior consists of liquid hydrogen that is not metallic. Uranus and Neptune, on the other hand, are too small to create pressures high enough to produce metallic hydrogen. This fascinating state of hydrogen is critical to understanding the magnetic fields of these giant planets, as the free movement of electrons within metallic hydrogen contributes to their strong magnetic fields.