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Cracked or damaged neon tubes present potential health risks from contact with broken glass and exposure to mercury, a heavy metal contaminant, in gas form. Though any mercury vapor, if present, will be in small amounts, [10] steps should still be taken to avoid contamination. If a neon tube appears damaged, it should not be handled.
Neon sign. The neon sign is an evolution of the earlier Geissler tube, [11] which is a sealed glass tube containing a "rarefied" gas (the gas pressure in the tube is well below atmospheric pressure). When a voltage is applied to electrodes inserted through the glass, an electrical glow discharge results.
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A General Electric NE-34 glow lamp, manufactured circa 1930. Neon was discovered in 1898 by William Ramsay and Morris Travers.The characteristic, brilliant red color that is emitted by gaseous neon when excited electrically was noted immediately; Travers later wrote, "the blaze of crimson light from the tube told its own story and was a sight to dwell upon and never forget."
with a half-life of 770(300) ys (7.7(3.0) × 10 −22 s). See isotopes of carbon for notes about the measurement. Light radioactive neon isotopes usually decay to fluorine or oxygen , while heavier ones decay to sodium .
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Google Docs is an online word processor and part of the free, web-based Google Docs Editors suite offered by Google. Google Docs is accessible via a web browser as a web-based application and is also available as a mobile app on Android and iOS and as a desktop application on Google's ChromeOS .
Vegas Vic, a 40-foot (12 m) tall neon sign built in 1951 for the Pioneer Club in Las Vegas, Nevada. The sign, built by the Young Electric Sign Company, shows the elaborate artistic effects that can be achieved. [18] Display of neon lighting samples in a glass studio. These neon tubes were essentially in their contemporary form.