Indium
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Indium is a chemical element; its symbol is In and its atomic number is 49. It is a silvery-white post-transition metal and one of the softest elements. Chemically, indium is similar to gallium and th
Indium wetting the glass surface of a test tube
A magnified image of an LCD screen showing RGB pixels. Individual transistors are seen as white dots in the bottom part.
Ductile indium wire
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
Crystals of hutchinsonite ((Tl,Pb)2As5S9)
A corroded thallium rod