Thallium
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Thallium is a chemical element; it has symbol Tl and atomic number 81. It is a silvery-white post-transition metal that is not found free in nature. When isolated, thallium resembles tin, but discolor
Thallium pieces in ampoule
Crystals of hutchinsonite ((Tl,Pb)2As5S9)
A corroded thallium rod
Mercury (element)
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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
Thallium
…chemical bonding than it is for the heavier elements. Thus, very few electrons are available for metallic bonding, similar to the neighboring elements mercury and lead. Thallium, then, like its congeners, is a soft, highly electrically conducting metal with a low melting point, of 304 °C. A number of standard…
Pouring liquid mercury bionerd
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.