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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/cm3)
0.00973 (20°C, g/cm3)

Half-life:

19386Rn = 1.15 ms (α (about 100%))
19486Rn = 780 μs (α (about 100%))
19586Rn = 7 ms (α (about 100%))
195m86Rn = 6 ms (α (about 100%))
19686Rn = 4.7 ms (α (about 100%))
19786Rn = 54 ms (α (about 100%))
197m86Rn = 25.6 ms (α (about 100%))
19886Rn = 65 ms ()
19986Rn = 590 ms ()
20086Rn = 1.09 s (α (92%))
200m86Rn = 28 μs (internal transition (100%))
20186Rn = 7.0 s ()
201m86Rn = 3.8 s ()
20286Rn = 9.7 s (α (78%))
202m86Rn = 2.22 μs (internal transition (100%))
20386Rn = 44 s (α (66%))
203m86Rn = 26.9 s (α (75%))
20486Rn = 1.242 min (α (72.4%))
20586Rn = 2.83 min ()
20686Rn = 5.67 min (α (62%), β+ (38%))
20786Rn = 9.25 min (β+ (79%), α (21%))
20886Rn = 24.35 min (α (62%), β+ (38%))
20986Rn = 28.8 min (β+ (83%), α (17%))
21086Rn = 2.4 h (α (96%))
21186Rn = 14.6 h (β+ (72.6%), α (27.4%))
21286Rn = 23.9 min (α (100%))
21386Rn = 19.5 ms (α (100%))
21486Rn = 270 ns (α (100%))
21586Rn = 2.3 μs (α (100%))
21686Rn = 45 μs (α (100%))
21786Rn = 540 μs (α (100%))
21886Rn = 35 ms (α (100%))
21986Rn = 3.96 s (α (100%))
22086Rn = 55.6 s (α (100%))
22186Rn = 25 min (β- (78%), α (22%))
22286Rn = 3.8235 d (α (100%))
22386Rn = 24.3 min (β- (100%))
22486Rn = 107 min (β- (100%))
22586Rn = 4.66 min (β- (100%))
22686Rn = 7.4 min (β- (100%))
22786Rn = 20.2 s (β- (100%))
22886Rn = 65 s (β- (100%))
22986Rn = 11.9 s ()

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

0 (g)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

0 (g)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

167.7 (g)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

20.79 (g)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

2.89

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

16.8

Critical temperature (°C):

104.35

Critical pressure (MPa):

6.326

References:

  1. Advances in Inorganic Chemistry. - Vol. 46. - Academic Press, 1999. - pp. 91-93
  2. Encyclopedia of inorganic chemistry. - editor R. Bruce King, 2 Ed., 10 volume set. - 2005
  3. Hopke P.K. Radon and Its Decay Products. - ACS Symposium Series, 1987
  4. Inorganic Chemistry. - 1984. - Vol. 23, No. 22. - pp. 3670-3671
  5. Бекман И.Н. Радиохимия. Том II: Радиоактивные элементы. - М.: Издатель Мархитин П.Ю., 2014. - pp. 84-90 [Russian]
  6. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 49, 51 [Russian]
  7. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 42 [Russian]
  8. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 91 [Russian]
  9. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 91 [Russian]
  10. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 587-590 [Russian]
  11. 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