All of them have except Saturn.
Saturn.
This planet could be Saturn, as its average density is around 0.69 g/cm³, which is lower than the density of water (1.0 g/cm³).
Certainly - all matter has density. The density of a gas planet would probably be less than that of a more solid planet but it would still have a non-zero density.
Saturn is the planet with a lower density than water, causing it to float if there were a large enough body of water for it to be placed in. Its average density is less than that of water due to its composition of mostly hydrogen and helium gases.
Paper clips have a density greater than the density of water.
All the gas giants; in our Solar System, Saturn has the lowest density (less than the density of water).
Saturn would be the most likely planet to "sink" in water, due to its low density and composition mostly of gases. However, no planet in our solar system could physically sink in water, as they are significantly larger and more massive than any body of water.
-- If the object floats in water, then its density is less than the density of water. -- If the object sinks in water, then its density is more than the density of water. -- If the object floats in air, then its density is less than the density of air. -- If the object sinks in air, then its density is less than the density of air.
No, the density of antimony is more than six times greater than the density of water so it will sink in water.
For floating in water: density under 1 g/cm3 For sinking in water: density more than 1 g/cm3
A planet's weight does not determine whether it can float in water. It's density is what determines that. Your question should be "Which planet's density is so small that it could float in water?"
The weight does not determine if an object will float in water. If an object has a DENSITY that is more than the density of water then it will sink, if it's density is less than the density of water it will float.