Chlorine
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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
Chlorine in bottle
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
Argon
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Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most abundant gas in Earth's atmosphere, at 0.934%. I
Chlorine
…decay mode of isotopes lighter than 35Cl is electron capture to isotopes of sulfur; that of isotopes heavier than 37Cl is beta decay to isotopes of argon; and 36Cl may decay by either mode to stable 36S or 36Ar. 36Cl occurs in trace quantities in nature as a cosmogenic nuclide in a ratio of about (7–10…
Argon discharge tube
A small piece of rapidly melting solid argon
Captioned "Argon", caricature of Lord Rayleigh in Vanity Fair, 1899
Cylinders containing argon gas for use in extinguishing fire without damaging server equipment