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The commonest noble gas which makes up almost 1% of the earth's atmosphere. Argon is heavy and used extensively in welding to prevent oxidation.
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Discharge tube.
When several thousand volts are applied to argon gas at low pressure the atoms ionize and a current flows causing light to be emitted at a characteristic mauve wavelength.
Source: custom manufactured
Size: symbol 5" tall
Purity: 99%
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