Sublime

non-reactivity is a rare and exceptional attribute that is useful across the economy. Helium doesn’t even interact with itself in any meaningful way and must be cooled to -269°C (just four degrees above absolute zero)

of one nitrogen and three hydrogens (NH3), which means that nitrogen makes up 82 percent of its mass.[9] At atmospheric pressure it is an invisible gas with a characteristic pungent smell of unflushed toilets or decomposing animal manure. Inhaling it in low concentrations causes headaches, nausea, and vomiting; higher concentrations irritate the

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