Question

Sniffer probes detect this substance, the most common tracer of leaks in pressurized tanks. Gas chromatography capillary columns still mainly use this substance as a carrier despite the availability of cheaper replacements. Uranium deposits coincide with natural sources of this substance, (20[3]0[3])which is detected spectroscopically (0[1])by its yellow D3 emission line. (0[1])NMR (0[1])magnets (0[1])are cooled by (20[1])vaporizing (20[1]0[1])this substance (0[1])at the lowest (*) boiling point (0[1])of any chemical. (10[1])Since this (10[1])substance is a byproduct (0[1])of natural gas extraction, the war in Ukraine has contributed to its fourth (10[1]0[1])recent global shortage. (10[1])In a common demonstration, (0[1])inhaling this element (10[4])raises (10[2])the pitch (10[4])of (10[1])one's (10[1])voice. (10[3])For 10 points, (10[2])name this (10[2])lightest noble gas. ■END■ (10[8])

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