Periodic Table/Astatine/²⁰⁰At

← 199At201At →

²⁰⁰At

Astatine-200

Radioactive· Half-life: 43.2 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

115

Mass Number (A)

200

Atomic Mass

199.990351AMU

Spin / Parity

3+

Binding E/A

7.567keV

Natural Abundance

Trace / None

Half-life

43.2 s

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

α

52.0%

β⁺

48.0%

Decay Chain

²⁰⁰AtAstatine43.2 s

α52.0%

β⁺²⁰⁰Po48.0%

¹⁹⁶BiBismuth5.13 min

β⁺100.0%

α¹⁹²Tl0.00%

¹⁹⁶PbLead37.0 min

β⁺100.0%

α¹⁹²Hg3.00%

¹⁹⁶TlThallium1.84 h

β⁺100.0%

¹⁹⁶HgMercurySTABLE

5-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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