Template:Infobox neon

Neon,  ₁₀Ne

Spectral lines of neon in the visible region
General properties
Name, symbol	neon, Ne
Appearance	colorless gas exhibiting an orange-red glow when placed in a high voltage electric field
Pronunciation	/ˈniːɒn/
Neon in the periodic table
He ↑ Ne ↓ Ar fluorine ← neon → sodium
Atomic number (Z)	10
Group, block	group 18 (noble gases), p-block
Period	period 2
Element category	noble gas
Standard atomic weight (±) (Ar)	20.1797(6)
Electron configuration	[He] 2s2 2p6
per shell	2, 8
Physical properties
Phase	gas
Melting point	24.56 K ​(−248.59 °C, ​−415.46 °F)
Boiling point	27.104 K ​(−246.046 °C, ​−410.883 °F)
Density at stp (0 °C and 101.325 kPa)	0.9002 g/L
when liquid, at b.p.	1.207 g/cm3
Triple point	24.556 K, ​43.37 kPa
Critical point	44.4918 K, 2.7686 MPa
Heat of fusion	0.335 kJ/mol
Heat of vaporization	1.71 kJ/mol
Molar heat capacity	20.79 J/(mol·K)
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	0
Ionization energies	1st: 2080.7 kJ/mol 2nd: 3952.3 kJ/mol 3rd: 6122 kJ/mol (more)
Covalent radius	58 pm
Van der Waals radius	154 pm
Miscellanea
Crystal structure	​face-centered cubic (fcc)
Speed of sound	435 m/s (gas, at 0 °C)
Thermal conductivity	49.1×10−3 W/(m·K)
Magnetic ordering	diamagnetic
Bulk modulus	654 GPa
CAS Number	7440-01-9
History
Prediction	William Ramsay (1897)
Discovery and first isolation	William Ramsay & Morris Travers (1898)
Most stable 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

References

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