Here's why:

* Density: Aluminum has a density of about 2.7 g/cm³. Water has a density of 1 g/cm³, ethanol is slightly less dense than water, and acetone is even less dense. Since aluminum is denser than all three liquids, it will sink in all of them.

It's possible you're thinking of a different metal. For example, a piece of aluminum foil might appear to float on water, but this is due to surface tension, not its density.

Let me know if you have any other questions about density or buoyancy!