NEET Physics Nuclei Questions Solved


The half life of polonium is 140 days. After how many days, 16 gm polonium will be reduced to 1 gm (or 15g will decay) 
(a) 700 days            (b) 280 days
(c) 560 days            (d) 420 days

(c) NN0=12t/140116=12t/140

t140=4t= 560 days

Difficulty Level:

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