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- ...rt [[glass]] particles. An alternative may use [[argon]] gas. Nitrogen and argon are both harmless. However, sodium azide as an aerosol is dangerous.24 KB (3,909 words) - 10:43, 8 October 2009
- ...Al has a natural abundance of 99.9+ %. <sup>26</sup>Al is produced from [[argon]] in the [[Earth's atmosphere|atmosphere]] by [[spallation]] caused by [[co35 KB (5,288 words) - 22:04, 13 July 2007