Stable isotope Radon (Rn)

Isotope Atomic Mass Half-life Mode of Decay Nuclear Spin Nuclear Magnetic Moment
Rn-210 209.98968 2.40 hours EC to At-210; α to Po-206 0 No data available
Rn-211 210.99059 14.60 hours EC to At-211; α to Po-207 1/2 0.60
Rn-212 211.99069 24.00 minutes α to Po-208 0 No data available
Rn-213 212.99387 0.025 seconds α to Po-209 9/2 No data available
Rn-214 213.99535 0.000027 seconds α to Po-210 0 -0.020
Rn-215 214.99873 0.0000023 seconds α to Po-211 9/2 No data available
Rn-216 216.00026 0.000045 seconds α to Po-212 No data available No data available
Rn-217 217.00391 0.0006 seconds α to Po-213 9/2 No data available
Rn-218 218.00559 0.035 seconds α to Po-214 0 No data available
Rn-219 219.00948 3.96 seconds α to Po-215 5/2 No data available
Rn-220 220.01138 55.60 seconds α to Po-216 0 No data available
Rn-221 221.0156 25.00 minutes α to Po-217; β- to Fr-221 7/2 No data available
Rn-222 222.017571 3.8235 days α to Po-218 0 No data available
Rn-223 223.0218 23.2 minutes α to Po-219; β- to Fr-223 No data available No data available
Rn-224 224.0241 107 minutes β- to Fr-224 No data available No data available
Rn-225 225.0284 4.50 minutes β- to Fr-225 No data available No data available
Rn-226 226.0309 7.40 minutes β- to Fr-226 No data available No data available
 

Properties of Radon

Name Radon
Symbol Rn
Atomic number 86
Atomic weight 222
Standard state Gas at 298 °K;(the heaviest known mononuclear gas at 298 °K)
CAS Registry ID 10043-92-2
Group in periodic table 18
Group name Noble gas
Period in periodic table 6
Block in periodic table p-block
Color Colorless
Classification Nonmetallic
Melting point -71 °C
Boiling point -61.7 °C
Liquefication point -61.8 °C
Solidification point -71 ºC
Thermal conductivity 0.00361 W/(m·K)
Heat of vaporization 17 kJ·mol-1
Heat of fusion 3 kJ·mol-1
Density of gas .0093 g/cm3
Density of solid 4.0 g/cm3
Electron configuration [He]4f145d106s26p6
Oxidation state 0
Critical temperature 104.4 ºC
Critical pressure 62.4 atm