Final answer:
The false statement concerning Jovian planets is that they all have solid surfaces; instead, they have dense cores beneath thick atmospheres of gases.
Step-by-step explanation:
Among the statements provided concerning Jovian planets, the false one is: Jovian planets all have solid surfaces. While Jovian planets like Jupiter, Saturn, Uranus, and Neptune are indeed very large and massive with low densities due to their composition of gases and ices, they do not possess solid surfaces.
Instead, these planets are more similar to vast, spherical oceans atop much smaller, dense cores, making the concept of a traditional solid surface inapplicable to them. The Jovian planets are known for their rapid rotation, possession of many satellites, and large magnetic fields, with Jupiter having the strongest magnetic field and largest magnetosphere of any planet in our Solar System. Additionally, all Jovian planets have ring systems, although some are more prominent than others.