Periodic Table/Radon/²⁰³Rn

← 202Rn204Rn →

²⁰³Rn

Radon-203

Radioactive· Half-life: 44.2 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

86

Neutrons (N)

117

Mass Number (A)

203

Atomic Mass

202.993361AMU

Spin / Parity

3/2-

Binding E/A

7.554keV

Natural Abundance

Trace / None

Half-life

44.2 s

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

α

66.0%

β⁺

34.0%

Decay Chain

²⁰³RnRadon44.2 s

α66.0%

β⁺²⁰³At34.0%

¹⁹⁹PoPolonium5.47 min

β⁺92.5%

α¹⁹⁵Pb7.50%

¹⁹⁹BiBismuth27.0 min

β⁺100.0%

¹⁹⁹PbLead1.50 h

β⁺100.0%

¹⁹⁹TlThallium7.42 h

β⁺100.0%

¹⁹⁹HgMercurySTABLE

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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