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Noble Gases Essay

1951 words - 8 pages

The noble gases are group 18 of the periodic table and are chemical elements with similar properties. All of the noble gases have a full outer shell. None of them have color, odor, and all have very low chemical reactivity. There are six of them and they are Helium, neon, argon, krypton, xenon, and radon.
Helium
Helium has an atomic number of 2. It is has no color, no odor, or no taste. It is also an inert monatomic gas. It is the first of the noble gases on the periodic table. It’s melting and boiling points are the lowest among all elements and only exists as a gas except in extreme conditions.
Helium is the second most abundant element in the universe, although not normally found naturally on earth but created by radioactive decay. Helium is one of the only elements with escape velocity which is when released into the atmosphere, it goes off into space. As a matter of fact helium is the only element to be found in space before being found on Earth. In 1868, an astronomer named Pierre Janssen was in India observing a solar eclipse. He was using spectroscope to help him with his observations, and while using it he saw a yellow line in the spectrum, which no one had ever heard of or saw. This indicated that the existence of an unknown element. Janssen named it helium after the Greek god Helios, otherwise known as Apollo, whom was associated with the Sun. Janseen got together with a well world known English astronomer Sir Joseph Lockyer who was best known for his work in analyzing light waves. Lockyer, just like Janssen, also believed that Janseen had discovered a new element. A few months later he also observed the same spectrum that Janseen had discovered. The spectroscope was still a new invention most of the science world didn’t trust it and didn’t believe Janseen and Lockyer, although they were obviously proved correct.
Neon
Neon is the chemical element with the symbol Ne and the atomic number of 10. It is the second of the noble gases. It is odorless and colorless and is an inert monatomic gas while under standard conditions. It is also chemically inert and does not form uncharged chemical compounds.
It was discovered in 1898 (along with krypton and xenon). It was discovered by a scientist by the name if Sir William Ramsay when he chilled a sample of air until it became a liquid. He then warmed up the liquid and captured the gasesas they boiled off... It is one of the three elements that remain in dry air after oxygen, argon, carbon dioxide, and nitrogen have been removed, the other two being krypton and xenon. Neon was number two out of three of these incredibly rare elements to be discovered. It was recognized as an element by its extremely bright red emission spectrum. The word neon comes from the Greek word νέον which means new.
Neon is used in glow lamps, high voltage discharge tubes, and advertising signs, a few plasma tube, and refrigerant applicants. When used in these products the neon gives off a reddish-orange glow. Neon also...

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