Periodic Table/Astatine/²¹⁹At

← 218At220At →

²¹⁹At

Astatine-219

Radioactive· Half-life: 56.0 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

134

Mass Number (A)

219

Atomic Mass

219.011161AMU

Spin / Parity

9/2-

Binding E/A

7.522keV

Natural Abundance

Trace / None

Half-life

56.0 s

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

α

93.6%

β⁻

6.4%

Decay Chain

²¹⁹AtAstatine56.0 s

α93.6%

β⁻²¹⁹Rn6.40%

²¹⁵BiBismuth7.62 min

β⁻100.0%

²¹⁵PoPolonium1.78 ms

α100.0%

β⁻²¹⁵At2.30%

²¹¹PbLead36.2 min

β⁻100.0%

²¹¹BiBismuth2.14 min

α100.0%

β⁻²¹¹Po0.28%

²⁰⁷TlThallium4.77 min

β⁻100.0%

²⁰⁷PbLeadSTABLE

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

Other Isotopes of Astatine

191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229

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