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Argon is preferred to less expensive nitrogen in cases where nitrogen may react with the reagents or apparatus. Argon may be used as the carrier gas in gas chromatography and in electrospray ionization mass spectrometry ; it is the gas of choice for the plasma used in ICP spectroscopy .
As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium. It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume. Carbon in the form of diamond can be more expensive than rhodium. Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars.
The intermolecular force between noble gas atoms is the very weak London dispersion force, so their boiling points are all cryogenic, below 165 K (−108 °C; −163 °F). [ 2 ] The noble gases' inertness , or tendency not to react with other chemical substances , results from their electron configuration : their outer shell of valence ...
Lithium is a soft, silvery alkali metal that, in its pure form, is so reactive and flammable it has to be stored either in a vacuum or an inert gas like argon or an inert liquid like mineral oil.
Helium is more expensive than argon and requires higher flow rates, so despite its advantages it may not be a cost-effective choice for higher-volume production. [9] Pure helium is not used for steel, as it causes an erratic arc and encourages spatter. Oxygen is used in small amounts as an addition to other gases; typically as 2–5% addition ...
Curious about the most expensive items sold on eBay? From a gigayacht to a U.S. town, here are 10 of the most extravagant listings we could find.
In the U.S., utility gas prices in September were 70% higher than in recent years. Europeans, who already pay much higher for natural gas, saw bills rise sharply by 50% — for example, in Estonia.
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