Neon is a colorless, odorless, and non-reactive noble gas. It is the fifth most abundant element in the universe. This element is usually used in colored indicators and display signs.
The density of neon is 1.29 grams per liter. The liquid range of neon is the smallest of any element.
The most common isotope is neon-20, which makes up 90% of naturally occurring neon. Only three Ne isotopes have stable half-lives.
Neon is the second lightest noble gas, behind helium. Neo has 10 electrons, while helium has eleven.
During the late 19th century, a Scottish scientist, Sir William Ramsay, discovered neon. He was the first to isolate helium and krypton. Later, he learned there was an unknown element between helium and argon. In 1898, he found neon in an argon sample.
When a high voltage was applied, neon’s signature red glow was observed. It was given the name neon from the Greek word neos.
After Ramsay’s discovery, he named the element neos, which is pronounced NEE-on. Instead of novum, he used the Greek word for “new”.
In 1898, Ramsay and Morris Travers discovered neon. They first froze a specimen of argon, then they evaporated it at a low pressure.
The next year, they repeated the experiment with krypton gas. This time, they discovered that the gas glowed with a crimson hue. Since then, neon has been discovered in planet-forming disks surrounding young stars.
Neon is not toxic, but if it is breathed in, it could cause asphyxiation. Because of its rare nature, it is not easily found on Earth. Moreover, pure neon is not available.