Periodic Table/Radon/²²⁰Rn

← 219Rn221Rn →

²²⁰Rn

Radon-220

Radioactive· Half-life: 55.6 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

86

Neutrons (N)

134

Mass Number (A)

220

Atomic Mass

220.011392AMU

Spin / Parity

0+

Binding E/A

7.518keV

Natural Abundance

Trace / None

Half-life

55.6 s

Decay Modesoverview · half-life · α · β⁻ · β⁺

α

100.0%

2β⁻

Decay Chain

²²⁰RnRadon55.6 s

α100.0%

2β⁻²²⁰Ra

²¹⁶PoPolonium144 ms

α100.0%

2β⁻²¹⁶Rn

²¹²PbLead10.6 h

β⁻100.0%

²¹²BiBismuth1.01 h

β⁻64.1%

α²⁰⁸Tl35.9%

β⁻α²⁰⁸Pb0.01%

²¹²PoPolonium294 ns

α100.0%

²⁰⁸PbLeadSTABLE

6-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Radon

193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231

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