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214 A radioactive isotope X decays by emitting two alpha (a) particles and one beta (3) to form 83Bi (a) What is the atomic

214 A radioactive isotope X decays by emitting two alpha (a) particles and one beta (3) to form 83Bi (a) What is the atomic 1 number of X? (b) After 112 days, of the mass of X remained. Determine the half-life of X. 16

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