fluorine ← neon → sodium He ↑ Ne ↓ Ar 10Ne Periodic table
Appearance
Colorless gas exhibiting an orange-red glow when placed in a high voltage electric field Neon gas in a discharge tube, so-called neon light. Spectral lines of neon in the visible region
General properties
Name, symbol, number	neon, Ne, 10
Pronunciation	/ˈniːɒn/
Element category	noble gases
Group, period, block	18, 2, p
Standard atomic weight	20.1797(6)
Electron configuration	1s2 2s2 2p6
Electrons per shell	2, 8 (Image)
Physical properties
Phase	gas
Density	(0 °C, 101.325 kPa) 0.9002 g/L
Liquid density at b.p.	1.207[1] g·cm−3
Melting point	24.56 K, -248.59 °C, -415.46 °F
Boiling point	27.07 K, -246.08 °C, -410.94 °F
Triple point	24.5561 K (-249°C), 43[2][3] kPa
Critical point	44.4 K, 2.76 MPa
Heat of fusion	0.335 kJ·mol−1
Heat of vaporization	1.71 kJ·mol−1
Molar heat capacity	5R/2 = 20.786 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 12 13 15 18 21 27
Atomic properties
Oxidation states	no data
Ionization energies (more)	1st: 2080.7 kJ·mol−1
	2nd: 3952.3 kJ·mol−1
	3rd: 6122 kJ·mol−1
Covalent radius	58 pm
Van der Waals radius	154 pm
Miscellanea
Crystal structure	face-centered cubic
Magnetic ordering	diamagnetic[4]
Thermal conductivity	49.1x10-3  W·m−1·K−1
Speed of sound	(gas, 0 °C) 435 m·s−1
Bulk modulus	654 GPa
CAS registry number	7440-01-9
Most stable isotopes
Main article: Isotopes of neon
iso NA half-life DM DE (MeV) DP 20Ne 90.48% 20Ne is stable with 10 neutrons 21Ne 0.27% 21Ne is stable with 11 neutrons 22Ne 9.25% 22Ne is stable with 12 neutrons
v t e · r

Neon ( /ˈniːɒn/ NEE-on) is the chemical element that has the symbol Ne and an atomic number of 10. Although a very common element in the universe, it is rare on Earth. A colorless, inert noble gas under standard conditions, neon gives a distinct reddish-orange glow when used in either low-voltage neon glow lamps or in high-voltage discharge tubes or neon advertising signs.^[5][6] It is commercially extracted from air, in which it is found in trace amounts.

History[link]

Neon gas-discharge lamps forming the symbol for Neon "Ne".

Neon (Greek νέον (neon) meaning "new one") was discovered in 1898 by the British chemists Sir William Ramsay (1852–1916) and Morris W. Travers (1872–1961) in London.^[7] Neon was discovered when Ramsay chilled a sample of air until it became a liquid, then warmed the liquid and captured the gases as they boiled off. The gases that boiled off, in addition to nitrogen, oxygen, and argon, were krypton, xenon, and neon.^[8] The characteristic, brilliant red color that is emitted by gaseous neon when excited electrically was noted immediately; Travers later wrote, "the blaze of crimson light from the tube told its own story and was a sight to dwell upon and never forget."^[9]

Neon's scarcity precluded its prompt application for lighting along the lines of Moore tubes, which used nitrogen and which were commercialized in the early 1900s. After 1902, Georges Claude's company, Air Liquide, was producing industrial quantities of neon as a byproduct of his air liquefaction business, and in December 1910 Claude demonstrated modern neon lighting based on a sealed tube of neon. In 1912, Claude's associate began selling neon discharge tubes as advertising signs. They were introduced to U.S. in 1923, when two large neon signs were bought by a Los Angeles Packard car dealership. The glow and arresting red color made neon advertising completely different from the competition.^[10]

Neon played a role in the basic understanding of the nature of atoms in 1913, when J. J. Thomson, as part of his exploration into the composition of canal rays, channeled streams of neon ions through a magnetic and an electric field and measured their deflection by placing a photographic plate in their path. Thomson observed two separate patches of light on the photographic plate (see image), which suggested two different parabolas of deflection. Thomson eventually concluded that some of the atoms in the neon gas were of higher mass than the rest. Though not understood at the time by Thomson, this was the first discovery of isotopes of stable atoms. It was made by using a crude version of an instrument we now term as a mass spectrometer.

Creation[link]

Stable forms of neon are produced in stars. It is created in fusing helium and oxygen in the alpha process, which requires temperatures above 100 megakelvins and masses greater than 3 solar masses.

Isotopes[link]

The first evidence for isotopes of a stable element. In the bottom right corner of J. J. Thomson's photographic plate are the separate impact marks for the two isotopes neon-20 and neon-22.

Neon is the second lightest inert gas. Neon has three stable isotopes: ²⁰Ne (90.48%), ²¹Ne (0.27%) and ²²Ne (9.25%). ²¹Ne and ²²Ne are partly primordial and partly nucleogenic (i.e., made by nuclear reactions of other nuclides with neutrons or other particles in the environment) and their variations in natural abundance are well understood. In contrast, ²⁰Ne (the chief primordial isotope made in stellar nucleosynthesis) is not known to be nucleogenic or radiogenic (save for cluster decay production, which is thought to produce only a small amount). The causes of the variation of ²⁰Ne in the Earth have thus been hotly debated.^[11]

The principal nuclear reactions which generate nucleogenic neon isotopes start from ²⁴Mg and ²⁵Mg, which produce ²¹Ne and ²²Ne, respectively, after neutron capture and immediate emission of an alpha particle. The neutrons that produce the reactions are mostly produced by secondary spallation reactions from alpha particles, in turn derived from uranium-series decay chains. The net result yields a trend towards lower ²⁰Ne/²²Ne and higher ²¹Ne/²²Ne ratios observed in uranium-rich rocks such as granites.^[12] Neon-21 may also be produced in a nucleogenic reaction, when ²⁰Ne absorbs a neutron from various natural terrestrial neutron sources.

In addition, isotopic analysis of exposed terrestrial rocks has demonstrated the cosmogenic (cosmic ray) production of ²¹Ne. This isotope is generated by spallation reactions on magnesium, sodium, silicon, and aluminium. By analyzing all three isotopes, the cosmogenic component can be resolved from magmatic neon and nucleogenic neon. This suggests that neon will be a useful tool in determining cosmic exposure ages of surface rocks and meteorites.^[13]

Similar to xenon, neon content observed in samples of volcanic gases is enriched in ²⁰Ne, as well as nucleogenic ²¹Ne, relative to ²²Ne content. The neon isotopic content of these mantle-derived samples represents a non-atmospheric source of neon. The ²⁰Ne-enriched components are attributed to exotic primordial rare gas components in the Earth, possibly representing solar neon. Elevated ²⁰Ne abundances are found in diamonds, further suggesting a solar neon reservoir in the Earth.^[14]

Characteristics[link]

Neon discharge tube

Neon is the second-lightest noble gas, after helium. It glows reddish-orange in a vacuum discharge tube. Also, neon has the narrowest liquid range of any element: from 24.55 K to 27.05 K (−248.45 °C to −245.95 °C, or −415.21 °F to −410.71 °F). It has over 40 times the refrigerating capacity of liquid helium and three times that of liquid hydrogen (on a per unit volume basis).^[1] In most applications it is a less expensive refrigerant than helium.^[15]

Spectrum of neon with ultraviolet (at left) and infrared (at right) lines shown in white

Neon plasma has the most intense light discharge at normal voltages and currents of all the noble gases. The average color of this light to the human eye is red-orange due to many lines in this range; it also contains a strong green line which is hidden, unless the visual components are dispersed by a spectroscope.^[16]

Two quite different kinds of neon lighting are in common use. Neon glow lamps are generally tiny, with most operating at about 100–250 volts.^[17] They have been widely used as power-on indicators and in circuit-testing equipment, but light-emitting diodes (LEDs) now dominate in such applications. These simple neon devices were the forerunners of plasma displays and plasma television screens.^[18][19] Neon signs typically operate at much higher voltages (2–15 kilovolts), and the luminous tubes are commonly meters long.^[20] The glass tubing is often formed into shapes and letters for signage as well as architectural and artistic applications.

Occurrence[link]

Neon is actually abundant on a universal scale; it is the fifth most abundant chemical element in the universe by mass, after hydrogen, helium, oxygen, and carbon (see chemical element). Its relative rarity on Earth, like that of helium, is due to its relative lightness, high vapor pressure at very low temperatures, and chemical inertness, all properties which tend to keep it from being trapped in the condensing gas and dust clouds which resulted in the formation of smaller and warmer solid planets like Earth.

Neon is monatomic, making it lighter than the molecules of diatomic nitrogen and oxygen which form the bulk of Earth's atmosphere; a balloon filled with neon will rise in air, albeit more slowly than a helium balloon.^[21]

Mass abundance in the universe is about 1 part in 750 and in the Sun and presumably in the proto-solar system nebula, about 1 part in 600. The Galileo spacecraft atmospheric entry probe found that even in the upper atmosphere of Jupiter, the abundance of neon is reduced (depleted) by about a factor of 10, to a level of 1 part in 6,000 by mass. This may indicate that even the ice-planetesimals which brought neon into Jupiter from the outer solar system, formed in a region which was too warm for them to have kept their neon (abundances of heavier inert gases on Jupiter are several times that found in the Sun).^[22]

Neon is rare on Earth, found in the Earth's atmosphere at 1 part in 65,000 (by volume) or 1 part in 83,000 by mass. It is industrially produced by cryogenic fractional distillation of liquefied air.^[1]

Applications[link]

"Neon" signs may use neon along with other noble gases.

Neon is often used in signs and produces an unmistakable bright reddish-orange light. Although still referred to as "neon", all other colors are generated with the other noble gases or by many colors of fluorescent lighting.

Neon is used in vacuum tubes, high-voltage indicators, lightning arrestors, wave meter tubes, television tubes, and helium-neon lasers. Liquefied neon is commercially used as a cryogenic refrigerant in applications not requiring the lower temperature range attainable with more extreme liquid helium refrigeration.

Both neon gas and liquid neon are relatively expensive – for small quantities, the price of liquid neon can be more than 55 times that of liquid helium. The driver for neon's expense is the rarity of neon, which unlike helium, can only be obtained from air.

The triple point temperature of neon (24.5561 K) is a defining fixed point in the International Temperature Scale of 1990.^[2]

Compounds[link]

Neon is the first p-block noble gas. Neon is generally considered to be inert. No true neutral compounds of neon are known. However, the ions Ne⁺, (NeAr)⁺, (NeH)⁺, and (HeNe⁺) have been observed from optical and mass spectrometric studies, and there are some unverified reports of an unstable hydrate.^[1]

See also[link]

• Expansion ratio
• Neon sign
• Neon lamp

Books View or order collections of articles	Neon Period 2 elements Noble gases Chemical elements (sorted alphabetically) Chemical elements (sorted by number)
Portals Access related topics	Chemistry portal
Find out more on Wikipedia's Sister projects	Images and media from Commons Definitions from Wiktionary Textbooks from Wikibooks Learning resources from Wikiversity

References[link]

External links[link]

• The Periodic Table of Videos video of Neon at YouTube
• WebElements.com – Neon.
• It's Elemental – Neon
• USGS Periodic Table – Neon
• Atomic Spectrum of Neon
• Neon Museum, Las Vegas

vep:Neon

John Mayer
Mayer at the Mile High Music Festival on July 20, 2008
Background information
Birth name	John Clayton Mayer
Born	(1977-10-16) October 16, 1977 (age 34) Bridgeport, Connecticut United States
Genres	Pop rock, blues rock, acoustic rock, blue-eyed soul
Occupations	Musician, songwriter, record producer, columnist, graphic designer, photographer, comedian, television host
Instruments	Guitar, vocals, omnichord, piano, vibraphone, harmonica, percussion, clarinet, violin
Years active	1998 (1998)–present
Labels	Arista, Aware, Columbia
Associated acts	John Mayer Trio, Fall Out Boy
Website	johnmayer.com
Notable instruments
Fender Stratocaster Martin Guitars Gibson Guitars

John Clayton Mayer ( /ˈmeɪ.ər/ MAY-ər;^[1] (born October 16, 1977) is an American pop and blues rock musician, singer-songwriter, recording artist, and music producer.^[2] Born in Bridgeport, Connecticut and raised in Fairfield, Connecticut, he attended Berklee College of Music in Boston. He moved to Atlanta in 1997, where he refined his skills and gained a following, and he now lives in New York City.^[3][4] His first two studio albums, Room for Squares and Heavier Things, did well commercially, achieving multi-platinum status. In 2003, he won a Grammy Award for Best Male Pop Vocal Performance for "Your Body Is a Wonderland."^[5]

Mayer began his career performing mainly acoustic rock, but gradually began a transition towards the blues genre in 2005 by collaborating with renowned blues artists such as B. B. King, Buddy Guy, and Eric Clapton, and by forming the John Mayer Trio. The blues influence can be heard throughout his 2005 live album Try! with the John Mayer Trio and his third studio album Continuum, released in September 2006. At the 49th Annual Grammy Awards in 2007 Mayer won Best Pop Vocal Album for Continuum and Best Male Pop Vocal Performance for "Waiting on the World to Change". He released his fourth studio album, Battle Studies, in November 2009. His fifth album, Born and Raised, was released on May 22, 2012. He has sold over 10 million albums in the U.S. and 20 million albums worldwide.

Early life[link]

John Clayton Mayer was born on October 16, 1977 in Bridgeport, Connecticut to Margaret, an English teacher, and Richard, a high school principal.^[6] He grew up in Fairfield, Connecticut, the second of three children.^[7] His father is Jewish, and Mayer has said that he "relat[es] to Judaism".^[8] He attended Fairfield High School in Fairfield^[9] although he was enrolled in the Center for Global Studies at Brien McMahon High School in Norwalk for his junior year (then known as the Center for Japanese Studies Abroad, it is a magnet program for students wanting to learn Japanese).^[10]

After watching Michael J. Fox's guitar performance as Marty McFly in Back to the Future, Mayer became fascinated with the instrument, and when he turned 13, his father rented one for him.^[11][12] A neighbor gave Mayer a Stevie Ray Vaughan cassette, which cultivated Mayer's love of blues music.^[13]a[›] Mayer started taking lessons from a local guitar-shop owner, Al Ferrante, and soon became consumed with playing the instrument.^[3][14] His singular focus concerned his parents, and they took him twice to see a psychiatrist—but Mayer was determined to be fine.^[3][14] Mayer says that the contentious nature of his parents' marriage led him to "disappear and create my own world I could believe in".^[3] After two years of practice, he started playing at blues bars and other venues in the area, while he was still in high school.^[10][12] In addition to performing solo, he was a member of a band called Villanova Junction (named for a Jimi Hendrix song) with Tim Procaccini, Joe Beleznay, and Rich Wolf.^[3][15] Mayer considered skipping college to pursue his music, but the disapproval of his parents dissuaded him from doing so.^[3]

When Mayer was seventeen, he was stricken with cardiac dysrhythmia and was hospitalized for a weekend. Reflecting on the incident, Mayer said, "That was the moment the songwriter in me was born," and he penned his first lyrics the night he got home from the hospital.^[4] Shortly thereafter, he began suffering from panic attacks, and lived with the fear of having to enter a mental institution.^[3] He continues to manage such episodes with Xanax, an anti-anxiety drug.^[4][16] After graduation, he worked for fifteen months at a gas station until he saved enough money to buy a 1996 Stevie Ray Vaughan signature Stratocaster.^[17]

Career[link]

Early career[link]

Mayer enrolled in the Berklee College of Music in Boston, Massachusetts, aged 19.^[7] However, at the urging of his college friend an Atlanta, Georgia native, Clay Cook, he left school after two semesters and moved with Cook to Atlanta.^[18] In Atlanta they formed a two-man band called LoFi Masters and began performing in local coffee houses and club venues such as Eddie's Attic.^[12] According to Cook, they began to experience musical differences due to Mayer’s desire to move more towards pop music.^[19] As a result, the two parted ways, and Mayer embarked on a solo career.^[18]

With the help of local producer and engineer Glenn Matullo, Mayer recorded the independent EP Inside Wants Out. Cook co-wrote many of the songs from the EP including Mayer's first commercial single release, "No Such Thing".^[19] The EP includes eight songs with Mayer on lead vocals and guitars. However, Cook's only contribution was backing vocals on the song "Comfortable". For the opening track, "Back To You", a full band was enlisted, including the EP’s co-producer David "DeLa" LaBruyere on bass guitars.^[20] Mayer and LaBruyere then began to perform throughout Georgia and nearby states.

Major label success[link]

	"City Love" excerpt noicon From the album Room for Squares.
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Mayer’s reputation began to build, and a March 2000 appearance at South by Southwest brought him to the attention of "launch" label, Aware Records.^[14][21][22] After including him in the Aware Festival concerts and having his songs included on Aware compilations, in early 2001, Aware released Mayer's internet-only album titled, Room for Squares. During this time, Aware inked a deal with Columbia Records that gave Columbia first pick in signing Aware artists, and so in September of the same year, Columbia remixed and re-released Room for Squares.^[23] As part of the major label "debut", the album's artwork was updated, and the track "3x5" was added. The re-release also included reworked studio versions of the first four songs from his indie album, Inside Wants Out.^[24]

By the end of 2002, Room for Squares had spawned several radio hits, including "No Such Thing," "Your Body Is a Wonderland", and ultimately, "Why Georgia". In 2003, Mayer won a Grammy for Best Male Pop Vocal Performance for "Your Body Is a Wonderland." In his acceptance speech he remarked, "This is very, very fast, and I promise to catch up."^[25] He also figuratively referred to himself as being sixteen, a remark that many mistook to mean that he was only sixteen years old at the time.^[26]

In 2003, Mayer released a live CD and DVD of a concert in Birmingham, Alabama titled Any Given Thursday. The concert featured songs previously not recorded, such as "Man on the Side" (co-written with Cook) and "Something's Missing", which later appeared on Heavier Things. The concert also included "Covered In Rain". According to the accompanying DVD documentary, this song is "part two" of the song "City Love", which features the line "covered in rain". Commercially, the album quickly peaked at number seventeen on the Billboard 200 chart. The CD/DVD received conservative, although consistent, praise, with critics torn between his pop-idol image, and (at the time) emerging guitar prowess. Erik Crawford (of Allmusic) asked "Is he the consummate guitar hero exemplified when he plays a cover of Stevie Ray Vaughan's 'Lenny', or is he the teen idol that the pubescent girls shriek for after he plays 'Your Body Is a Wonderland?'"^[27][28]

Heavier Things, Mayer's second album, was released in 2003 to generally favorable reviews. Rolling Stone, Allmusic and Blender all gave positive, although reserved, feedback. PopMatters said that it "doesn't have as many drawbacks as one might assume".^[29] The album was commercially successful, and while it did not sell as well as Room for Squares, it peaked at number one on the US Billboard 200 chart. Mayer earned his first number one single with the song "Daughters" as well as a 2005 Grammy for Song of the Year, beating out fellow contenders Alicia Keys and Kanye West. He dedicated the award to his grandmother, Annie Hoffman, who died in May 2004. He also won Best Male Pop Vocal Performance, beating Elvis Costello, Prince, and Seal for the award. In a February 9, 2009 interview on The Ellen DeGeneres Show, Mayer said that he thought he should not have won the Grammy for Song of the year because he thought that Alicia Keys' If I Ain't Got You was the better song. Because of this, he removed the top half of the Grammy and gave it to Keys, and kept the bottom part for himself. At the 37th Annual Songwriters Hall of Fame Induction Ceremony in 2006, Mayer was honored with the Hal David Starlight Award.^[30]

Mayer again recorded live concerts across seven nights of his U.S. tour in 2004. These recordings were released to the iTunes Store under the title As/Is, indicating that the errors were included along with the good moments. A few months later, a "best of" CD was compiled from the As/Is nights. The album included a previously unreleased cover of Marvin Gaye's song "Inner City Blues (Make Me Wanna Holler)", featuring a solo from Mayer's support act, jazz and blues turntablist DJ Logic. All the album covers of the As/Is releases feature drawings of anthropomorphic bunnies.^[31]

January 2005, left to right: David Ryan Harris, John Mayer and Steve Jobs at Macworld 11, SF Moscone Center.

With increased exposure, Mayer's talent came into demand in other areas. Steve Jobs invited Mayer to perform during the keynote address of Apple's annual Macworld Conference & Expo, in January 2004, as Jobs introduced the software application GarageBand.^[32] The gig led to Mayer becoming a fixture of the event. He rejoined Jobs on stage for a solo performance at Macworld 2007, following the announcement of the iPhone.^[33] Mayer has also done endorsements, such as a Volkswagen commercial for the Beetle's guitar outlet and for the BlackBerry Curve.^[34]

Change in musical direction[link]

Mayer began to collaborate extensively, often working with artists outside of his own genre. He appeared on Common's song "Go!" and on Kanye West's "Bittersweet Poetry".^b[›] Following these collaborations, Mayer received praise from rap heavyweights Jay-Z and Nelly.^[35] When asked about his presence in the hip hop community, Mayer said, "It's not music out there right now. That's why, to me, hip-hop is where rock used to be."^[36]

	"Go!" excerpt noicon From the album Be. In 2004, after the three saw the movie Ray together, Kanye West and Mayer joined Common back in the studio. Mayer came up with the song's concept—fantasies—and his vocals were sampled for the track.[37]
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