MacRoscopic Properties: The World We SeeFood and Senses |
What is a surfactant? |
Surfactants are molecules that reduce the surface tension of a liquid. These are typically amphiphilic organic molecules, which means that they have one hydrophobic and one hydrophilic section. This will cause them to align in a certain way at the surface of a liquid which interrupts the order of the liquid at the surface, lowering the surface tension.

Mercury is the only metal that is a liquid at room temperature. It is also toxic and should not be handled with bare hands.