Periodic Table/Astatine/²¹¹At

← 210At212At →

²¹¹At

Astatine-211

Radioactive· Half-life: 7.21 h

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

126

Mass Number (A)

211

Atomic Mass

210.987496AMU

Spin / Parity

9/2-

Binding E/A

7.606keV

Natural Abundance

Trace / None

Half-life

7.21 h

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

EC

58.2%

α

41.8%

Decay Chain

²¹¹AtAstatine7.21 h

EC58.2%

α²⁰⁷Bi41.8%

²¹¹PoPolonium516 ms

α100.0%

²⁰⁷PbLeadSTABLE

3-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

← Back to AstatineData: IAEA NDS · ENSDF