NEET Physics Nuclei Questions Solved


Starting with a sample of pure Cu6678 of it decays into Zn in 15 min. The corresponding half-life is 
(a) 5 min               (b) 712 min
(c) 10 min             (d) 15 min

(a) 78 part decays i.e. remaining part is 18

N=N012tT1/218=1215T1/2T1/2=5 min

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