Revision as of 21:16, 12 January 2020 by imported>Nrco0e
[[Category:Template:Pagetype with short description]]
Radon, 86RnRadon |
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Pronunciation | (Template:Respell) |
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Appearance | colorless gas |
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Mass number | [222] |
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Radon in the periodic table |
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Atomic number (Z) | 86 |
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Group | group 18 (noble gases) |
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Period | period 6 |
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Block | p-block |
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Electron configuration | [Xe] 4f14 5d10 6s2 6p6 |
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Electrons per shell | 2, 8, 18, 32, 18, 8 |
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Physical properties |
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Phase at STP | gas |
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Melting point | 202 K (−71 °C, −96 °F) |
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Boiling point | 211.5 K (−61.7 °C, −79.1 °F) |
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Density (at STP) | 9.73 g/L |
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when liquid (at b.p.) | 4.4 g/cm3 |
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Critical point | 377 K, 6.28 MPa[1] |
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Heat of fusion | 3.247 kJ/mol |
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Heat of vaporization | 18.10 kJ/mol |
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Molar heat capacity | 5R/2 = 20.786 J/(mol·K) |
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Vapor pressure
P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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at T (K)
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110
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121
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134
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152
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176
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211
|
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Atomic properties |
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Oxidation states | 0, +2, +6 |
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Electronegativity | Pauling scale: 2.2 |
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Ionization energies | |
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Covalent radius | 150 pm |
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Van der Waals radius | 220 pm |
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Spectral lines of radon |
Other properties |
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Natural occurrence | from decay |
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Crystal structure | face-centered cubic (fcc) |
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Thermal conductivity | 3.61×10−3 W/(m·K) |
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Magnetic ordering | non-magnetic |
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CAS Number | 10043-92-2 |
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History |
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Discovery | Ernest Rutherford and Robert B. Owens (1899) |
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First isolation | William Ramsay and Robert Whytlaw-Gray (1910) |
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Main isotopes of radon |
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Category: Radon | references |
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References
These references will appear in the article, but this list appears only on this page.
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