Halogen
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The halogens are a group in the periodic table consisting of six chemically related elements, fluorine, chlorine, bromine, iodine, and the radioactive elements astatine and tennessine, though some aut
From left to right: chlorine, bromine, and iodine at room temperature. Chlorine is a gas, bromine is a liquid, and iodine is a solid. Fluorine could not be included in the image due to its high reactivity, and astatine and tennessine due to their radioactivity.
Liquid fluorine
Chlorine in bottle
Bromine vial in acrylic cube
Noble gas
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The noble gases are the members of group 18 of the periodic table: helium, neon, argon, krypton, xenon, radon and, in some cases, oganesson. Under standard conditions, the first six of these elements
Halogen
…the only element more electronegative than oxygen, it attacks otherwise-inert materials such as glass, and it forms compounds with the usually inert noble gases. It is a corrosive and highly toxic gas. The reactivity of fluorine is such that, if used or stored in laboratory glassware, it can react with glass…
Thanks to its characteristic spectral lines, Helium was discovered to exist on the Sun before it was discovered on Earth.
Liquid helium is used to cool superconducting magnets in modern MRI scanners.
Goodyear Blimp
15,000-watt xenon short-arc lamp used in IMAX projectors