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Half-life period of Promethium (Pm)

Find half-life period of radioactive isotopes of different elements; find its decay type and list of particle emitted. Half-life is the time required for a quantity of radioactive element to reduce to half of its initial value.
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 Half-life period of Promethium (Pm)
MassSymbolDecay TypeHalf-Life
145145PmElectron capture (e)17.73 year
146146PmElectron capture (e)5.53 years
147147PmBeta decay (ß-), Gamma decay2.6234 years
148148Pm5.37 days
149149Pm53.08 hours
151151Pm28.40 hours
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