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Properties of substance:
neon
Group of substances:
inorganic
Physical appearance:
colorless gas
Empirical formula (Hill's system for organic substances):
Ne
Structural formula as text:
Ne
Molar/atomic mass: 20.179
Melting point (°C):
-249
Boiling point (°C):
-246
Solubility (g/100 g of solvent):
acetone
: 0.00387 (15°C) [
Ref.
]
acetone
: 0.00432 (25°C) [
Ref.
]
benzene
: 0.00229 (15°C) [
Ref.
]
benzene
: 0.00259 (25°C) [
Ref.
]
cyclohexane
: 0.004 (20°C) [
Ref.
]
ethanol
: 0.00343 (15°C) [
Ref.
]
ethanol
: 0.00375 (25°C) [
Ref.
]
methanol
: 0.00372 (15°C) [
Ref.
]
methanol
: 0.004 (25°C) [
Ref.
]
water
: 0.00111 (0°C) [
Ref.
]
water
: 0.00104 (25°C) [
Ref.
]
water
: 0.000882 (74°C) [
Ref.
]
Numerical data:
Year of discovery: 1898
Ionization Potentials (Electronvolts): 21.565
Density:
1.205 (-246°C, g/cm
3
)
0.00090035 (20°C, g/cm
3
)
Half-life:
15
10
Ne = 770 ys (2p (100%))
16
10
Ne = 0.009 as (2p (100%); mass excess 23996 keV)
17
10
Ne = 109.2 ms (β
+
(100%))
18
10
Ne = 1.672 s (β
+
(100%))
19
10
Ne = 17.296 s (β
+
(100%))
20
10
Ne = stable (mass excess -7041,93 keV (isotopic abundance 90,48%))
21
10
Ne = stable (mass excess -5731,78 keV (isotopic abundance 0,27%))
22
10
Ne = stable (mass excess -8024,715 keV (isotopic abundance 9,25%))
23
10
Ne = 37.24 s (β
-
(100%))
24
10
Ne = 3.38 min (β
-
(100%))
25
10
Ne = 602 ms (β
-
(100%))
26
10
Ne = 197 ms (β
-
(100%); mass excess 430 keV)
27
10
Ne = 32 ms (β
-
(100%); mass excess 7070 keV)
28
10
Ne = 18.3 ms (β
-
(100%))
29
10
Ne = 15.6 ms (β
-
(100%))
30
10
Ne = 5.8 ms (β
-
(100%))
31
10
Ne = 3.4 ms (β
-
(100%))
32
10
Ne = 3.5 ms (β
-
(100%))
Vapour pressure (Torr):
1 (-257.3°C)
10 (-254.7°C)
100 (-251°C)
Permittivity (dielectric constant):
1.000127 (0°C)
1.1907 (-247.04°C)
Speed sound (m/s):
433.4 (0°C, aggregative state - gas)
461.3 (30.5°C, aggregative state - gas)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
0 (g)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
0 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
146.22 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
20.79 (g)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
0.33
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
1.79
Critical temperature (°C):
-228.7
Critical pressure (MPa):
2.73
Critical density (g/cm
3
):
0.484
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1336
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 46 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 24, 86 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 576-578 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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