Floating on Mercury: metal mercury (Hg) is liquid at room temperature, and it is 13.5 times more dense than water- more dense than many other metals. US coins float on its surface! Caution: contact with the skin and breathing vapors are to be avoided with mercury- make sure to have proper training when investigating this hazardous material. ➡️ Follow the link in my profile to learn more and for info on where to get the amazing items featured here on @physicsfun #physics #physicstoy #physicsfun #