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On Earth, the vast majority of argon is the isotope argon-40, which arises from the radioactive decay of potassium-40, according to Chemicool.But in space, argon is made in stars, when a two hydrogen nuclei, or alpha-particles, fuse with silicon-32. (Isotopes of an element have varying numbers of neutrons in the nucleus.) Though inert, argon is far from rare; it makes up 0.94 percent of Earth's atmosphere, according to the Royal Society of Chemistry (RSC).The two shared the Nobel Prize in Chemistry in 1904 for the discovery.Argon led to other eureka moments for Ramsey, as well.Cavendish wasn't able to figure out what this mysterious 1 percent was; the discovery would come more than a century later, in 1894.

what is potassium argon dating used for-75what is potassium argon dating used for-33

Researchers then quantify the number of cells that died with and without argon treatment.

Argon is also a good insulator, so it's often pumped into deep-sea diving dry suits to keep the diver warm.

Another use for argon is in historical preservation. Unlike reactive oxygen, the argon doesn't degrade the paper or ink on delicate documents.

The gas is pumped around important documents such as a map of the world dating back to 1507 in the Library of Congress, and a copy of the Magna Carta held by the U. For many years, the noble gas xenon has been researched as a treatment for brain injuries.

Xenon, however, is expensive, leading researchers to turn to its noble gas cousin, argon, as a potential alternative.

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