* Density is Key: Whether something floats or sinks in mercury depends on its density compared to mercury's density. Mercury is incredibly dense (13.5 g/cm³).
* Things that float:
* Most metals: Many metals, like iron, gold, and copper, are denser than mercury and will sink.
* Some alloys: Certain alloys (mixtures of metals) can be less dense than mercury and float.
* Things that sink:
* Water: Water is significantly less dense than mercury.
* Most organic materials: Wood, plastics, and many other organic compounds are less dense than mercury.
* Gases: Gases are much less dense than mercury.
Important Note: Mercury is extremely toxic, so it's crucial to handle it with extreme caution. Avoid direct contact and always work in a well-ventilated area.
