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Properties of substance:
radon
Group of substances:
inorganic
Physical appearance:
colorless gas
Empirical formula (Hill's system for organic substances):
Rn
Structural formula as text:
Rn
Molar/atomic mass: 222
Melting point (°C):
-71
Boiling point (°C):
-61.9
CAS №: 14859-67-7
Solubility (g/100 g of solvent):
acetone
: 7.51 (20°C) [
Ref.
]
benzene
: 14.2 (18°C) [
Ref.
]
ethanol
: 7.43 (20°C) [
Ref.
]
hexane
: 24.5 (18°C) [
Ref.
]
water
: 0.496 (0°C) [
Ref.
]
water
: 0.24 (20°C) [
Ref.
]
water
: 0.126 (50°C) [
Ref.
]
Numerical data:
Year of discovery: 1900
Density:
4.4 (-62°C, g/cm
3
)
0.00973 (20°C, g/cm
3
)
Half-life:
193
86
Rn = 1.15 ms (α (about 100%))
194
86
Rn = 780 μs (α (about 100%))
195
86
Rn = 7 ms (α (about 100%))
195m
86
Rn = 6 ms (α (about 100%))
196
86
Rn = 4.7 ms (α (about 100%))
197
86
Rn = 54 ms (α (about 100%))
197m
86
Rn = 25.6 ms (α (about 100%))
198
86
Rn = 65 ms ()
199
86
Rn = 590 ms ()
200
86
Rn = 1.09 s (α (92%))
200m
86
Rn = 28 μs (internal transition (100%))
201
86
Rn = 7.0 s ()
201m
86
Rn = 3.8 s ()
202
86
Rn = 9.7 s (α (78%))
202m
86
Rn = 2.22 μs (internal transition (100%))
203
86
Rn = 44 s (α (66%))
203m
86
Rn = 26.9 s (α (75%))
204
86
Rn = 1.242 min (α (72.4%))
205
86
Rn = 2.83 min ()
206
86
Rn = 5.67 min (α (62%), β
+
(38%))
207
86
Rn = 9.25 min (β
+
(79%), α (21%))
208
86
Rn = 24.35 min (α (62%), β
+
(38%))
209
86
Rn = 28.8 min (β
+
(83%), α (17%))
210
86
Rn = 2.4 h (α (96%))
211
86
Rn = 14.6 h (β
+
(72.6%), α (27.4%))
212
86
Rn = 23.9 min (α (100%))
213
86
Rn = 19.5 ms (α (100%))
214
86
Rn = 270 ns (α (100%))
215
86
Rn = 2.3 μs (α (100%))
216
86
Rn = 45 μs (α (100%))
217
86
Rn = 540 μs (α (100%))
218
86
Rn = 35 ms (α (100%))
219
86
Rn = 3.96 s (α (100%))
220
86
Rn = 55.6 s (α (100%))
221
86
Rn = 25 min (β
-
(78%), α (22%))
222
86
Rn = 3.8235 d (α (100%))
223
86
Rn = 24.3 min (β
-
(100%))
224
86
Rn = 107 min (β
-
(100%))
225
86
Rn = 4.66 min (β
-
(100%))
226
86
Rn = 7.4 min (β
-
(100%))
227
86
Rn = 20.2 s (β
-
(100%))
228
86
Rn = 65 s (β
-
(100%))
229
86
Rn = 11.9 s ()
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)):
167.7 (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):
2.89
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
16.8
Critical temperature (°C):
104.35
Critical pressure (MPa):
6.326
References:
Advances in Inorganic Chemistry. - Vol. 46. - Academic Press, 1999. - pp. 91-93
Encyclopedia of inorganic chemistry. - editor R. Bruce King, 2 Ed., 10 volume set. - 2005
Hopke P.K. Radon and Its Decay Products. - ACS Symposium Series, 1987
Inorganic Chemistry. - 1984. - Vol. 23, No. 22. - pp. 3670-3671
Бекман И.Н. Радиохимия. Том II: Радиоактивные элементы. - М.: Издатель Мархитин П.Ю., 2014. - pp. 84-90 [Russian]
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 49, 51 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 42 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 91 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 91 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 587-590 [Russian]
Аврорин В.В., Красикова Р.Н., Нефедов В.Д., Торопова М.А. Современное состояние химии радона / Успехи химии. - 1982. - Т.51, №1. - pp. 23-39 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru