kidzsearch.com > wiki Explore:
images 
videos 
games
Neon
| |||||||||||||||||||||||||
| Appearance | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
colourless 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) g·mol−1 | ||||||||||||||||||||||||
| Electron configuration | [He] 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 | ||||||||||||||||||||||||
| Specific heat capacity | (25 °C) 5R/2 = 20.786 J·mol−1·K−1 | ||||||||||||||||||||||||
| Vapor pressure | |||||||||||||||||||||||||
| |||||||||||||||||||||||||
| Atomic properties | |||||||||||||||||||||||||
| Oxidation states | 0 | ||||||||||||||||||||||||
| Ionization energies |
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 | (300 K) 49.1x10-3 W·m−1·K−1 | ||||||||||||||||||||||||
| Speed of sound | (gas, 0 °C) 435 m/s | ||||||||||||||||||||||||
| Bulk modulus | 654 GPa | ||||||||||||||||||||||||
| CAS registry number | 7440-01-9 | ||||||||||||||||||||||||
| Most stable isotopes | |||||||||||||||||||||||||
| Main article: Isotopes of Neon | |||||||||||||||||||||||||
| |||||||||||||||||||||||||
Neon is a noble gas. It is chemical element 10 on the periodic table. Its symbol is Ne.
The word "neon" comes from the Greek word meaning "new". It was discovered by William Ramsay and Morris W. Travers in 1898.
Neon does not react with other elements, so it is found by itself. There is not much neon in the air, and it is clear, so we do not see it.
Neon gas is used in lamps. When electricity goes through the neon, it lights up in many different colors. Due to this quality, it is used in signs.
Neon is also a term referring to a type of color that is very bright, such as lime green.
No true chemical compounds including the neutral compounds of neon are known. Where there is the helium compound HHeF, which might be stable, the analogous componund with Neon is not.[5]
Related pages
References
- ↑ Hammond, C.R. (2000). The Elements, in Handbook of Chemistry and Physics 81st edition. CRC press. p. 19. . http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elements.pdf.
- ↑ Preston-Thomas, H. (1990). "The International Temperature Scale of 1990 (ITS-90)". Metrologia 27: 3–10. . http://www.bipm.org/en/publications/its-90.html.
- ↑ "Section 4, Properties of the Elements and Inorganic Compounds; Melting, boiling, triple, and critical temperatures of the elements". CRC Handbook of Chemistry and Physics (85th edition ed.). Boca Raton, Florida: CRC Press. 2005.
- ↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
- ↑ Errol G. Lewars: Modeling Marvels: Computational Anticipation of Novel Molecules. Springer Verlag, 2008, ISBN 978-1-4020-6972-7, S. 69–80.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Help Improve This Page: Please contact us to become an approved KidzSearch editor and provide your credentials. You can also give immediate feedback in our Wiki Feedback Forum.
{{Link GA|e
|
|
|
|
