N????nu,  ₁₀ Ne

N????nu
Ihansoju	colorless gas exhibiting an orange-red glow when placed in a high voltage electric field
Iwuwo at??mu A r, std (Ne)	20.1797(6) [1]
N????nu ni ori tabili aye
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson He ↑ Ne ↓ Ar fluorini ← n????nu → sodi??mu
N??mba at??mu ( Z )	10
?gb??	group 18 (noble gases)
Aye	aye 2
Adip??	Adip??-p
??ka ??lim??nti	??fuufu abiire
Ito ??l??ktr??nu	[ He ] 2s 2 2p 6
Iye ??l??ktr??nu lori ipele k????kan	2, 8
Aw?n ohun ini ara
Ifarahan at  STP	??fuufu
Igba iy??	24.56  K ​(-248.59 °C, ​-415.46 °F)
Igba iho	27.07 K ​(-246.08 °C, ​-410.94 °F)
Kiki (at STP)	0.9002 g/L
when liquid (at  b.p. )	1.207 [2]  g/cm 3
Triple point	24.5561 K, ​43 [3] [4]  kPa
Critical point	44.4 K, 2.76 MPa
Heat of fusion	0.335  kJ/mol
Heat of	1.71 kJ/mol
Molar heat capacity	5 R /2 = 20.786 J/(mol·K)
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	0
energies	( more )
Covalent radius	58   pm
Van der Waals radius	154  pm
Spectral lines of n????nu
Other properties
Natural occurrence	primordial
Crystal structure	​(fcc)
Speed of sound	(gas, 0 °C) 435 m/s
Thermal conductivity	49.1x10 -3   W/(m·K)
Magnetic ordering	diamagnetic [5]
Bulk modulus	654 GPa
CAS Number	7440-01-9
History
Prediction	William Ramsay (1897)
Discovery	William Ramsay & Morris Travers [6] (1898)
First isolation	William Ramsay & Morris Travers [7] (1898)
Main isotopes of n????nu
Iso­tope Abun­dance Half-life ( t 1/2 ) Decay mode Pro­duct 20 Ne 90.48% 20 Ne is stable with 10 neutrons 21 Ne 0.27% 21 Ne is stable with 11 neutrons 22 Ne 9.25% 22 Ne is stable with 12 neutrons
Adak?:Category-inline wo ??r?? atun?e | references

N????nu ni ??lim??nti k??mika kan to ni ami-idam?? Ne ati n??mba at??mu 10. O wa ninu ?gb?? 18 (aw?n ??fuufu abiire) lori tabili idasiko aw?n ??lim??nti . Lab?? aw?n i???l?? deede n????nu j?? ??fuufu oniat??mukan alailaw??, alailooorun, o j?? ida meji ninu m??ta ij??kiki af??f??. O je wiwari (pap?? m?? kriptoni ati ks??n??nu) ni 1898 g??g??bi ikan ninu aw?n ??lim??nti aigbera tos??w??n to ???ku ninu af??f?? gbigb?, l??yin ti nitrojin, ??ksijin, arg??nu ati di??ksidi karb??nu ti j?? yiy? kuro. N????nu ni o j?? ekeji ninu aw?n ??fuufu a???w??n m??t????ta to j?? wiwari, o si j?? didam?? kiakia bii ??lim??nti tuntun nitori igbaja-aw?? itusita pupa r??. Oruk? r?? wa lati ??r?? ede Griiki to tum??si "ohun tuntun." N????nu j?? alaigbera bii k??mika, ko si le da adap?? k??mika alaini-agberu.

During cosmic nucleogenesis of the elements, large amounts of neon are built up from the alpha-capture fusion process in stars. Although neon is a very common element in the universe and solar system (it is fifth in cosmic abundance after hydrogen, helium, oxygen and carbon), it is very rare on Earth. It composes about 18.2 ppm of air by volume (this is about the same as the molecular or mole fraction), and a smaller fraction in the crust. The reason for neon's relative scarcity on Earth and the inner (terrestrial) planets, is that neon forms no compounds to fix it to solids, and is highly volatile, therefore escaping from the planetesimals under the warmth of the newly-ignited Sun in the early Solar System. Even the atmosphere of Jupiter is somewhat depleted of neon, presumably for this reason.

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 . ^{[8] [9]} The red emission line from neon is also responsible for the well known red light of helium-neon lasers . Neon is used in a few plasma tube and refrigerant applications but has few other commercial uses. It is commercially extracted by the fractional distillation of liquid air . It is considerably more expensive than helium, since air is its only source.

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