Mercury is a chemical element; it has symbol Hg and atomic number 80. It is commonly known as quicksilver. A heavy, silvery d-block element, mercury is the only metallic element that is known to be li
A round pound coin (density ~7.6 g/cm3) floats on mercury due to the buoyancy force upon it and appears to float higher because of the strong surface tension of the mercury.
Native mercury with cinnabar, Socrates mine, Sonoma County, California. Cinnabar sometimes alters to native mercury in the oxidized zone of mercury deposits.
Medical mercury thermometer.
Chlorine is a chemical element; it has symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly
Carl Wilhelm Scheele, discoverer of chlorine
Solid chlorine at −150 °C
Chlorine, liquefied under a pressure of 7.4 bar at room temperature, displayed in a quartz ampule embedded in acrylic glass