49: Indium, In, used in low melting point alloys to replace mercury, 50: tin, Sn, discovered in 3000 BC, 51: Antimony, Sb, mostly melted down and added to lead to make bullets and batteries, 52: Tellurium, Te, If you absorb even small amounts you will smell of garlic for months, 53: Iodine, I, evaporates into a violet vapor, 54: Xenon, Xe, tubes filled with this gas and driven by high-voltage capacitors are used in modern camera flashes, 55: cesium, Cs, discovered in 1860 in Germany, 56: Barium, Ba, used as a "getter" in high-vacuum components,

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