Periodic Table/Lead/¹⁸⁷Pb

← 186Pb188Pb →

¹⁸⁷Pb

Lead-187

Radioactive· Half-life: 15.2 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

82

Neutrons (N)

105

Mass Number (A)

187

Atomic Mass

186.983911AMU

Spin / Parity

3/2-

Binding E/A

7.584keV

Natural Abundance

Trace / None

Half-life

15.2 s

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

β⁺

90.5%

α

9.5%

Decay Chain

¹⁸⁷PbLead15.2 s

β⁺90.5%

α¹⁸³Hg9.50%

¹⁸⁷TlThallium?

β⁺100.0%

α¹⁸³Au

¹⁸⁷HgMercury1.90 min

β⁺100.0%

α¹⁸³Pt

¹⁸⁷AuGold8.30 min

β⁺100.0%

α¹⁸³Ir

¹⁸⁷PtPlatinum2.35 h

β⁺100.0%

¹⁸⁷IrIridium10.5 h

β⁺100.0%

¹⁸⁷OsOsmiumSTABLE

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

Other Isotopes of Lead

178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220

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