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Cithakan:Infobox radon .
Radon, 86 Rn Pangucapan (RAY -don ) Wujud Colorless gas nomer massa 222 (most stable isotope)
Atomic number (Z ) 86 Group group 18 (noble gases) Period period 6 Blok p-block Konfigurasi èlèktron [Xe ] 4f14 5d10 6s2 6p6 Electrons per shell
2, 8, 18, 32, 18, 8 Phase at STP gas Melting point 202.0 K (−71.15 °C, −96.07 °F) Boiling point 211.3 K (−61.85 °C, −79.1 °F) Density (at STP) 9.73 g/L when liquid (at b.p. ) 4.4 g/cm3 Critical point 377 K, 6.28 MPa Heat of fusion 3.247 kJ/mol Heat of vaporization 18.10 kJ/mol Molar heat capacity 5R/2 = 20.786 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
110
121
134
152
176
211
Oxidation states 2 Electronegativity Pauling scale: 2.2 Covalent radius 150 pm Van der Waals radius 220 pm Crystal structure face-centered cubic (fcc) Thermal conductivity 3.61 m W/(m·K) Magnetic ordering non-magnetic CAS Number 10043-92-2
Isotope
Abundance
Half-life (t 1/2 )
Decay mode
Product
210 Rn
syn
2.4 h
α
6.404
206 Po
211 Rn
syn
14.6 h
ε
2.892
211 At
α
5.965
207 Po
222 Rn
trace
3.8235 d
α
5.590
218 Po
224 Rn
syn
1.8 h
β
0.8
224 Fr
| references | in Wikidata
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