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Q.33. What is the disintegration constant of radon if the number of its atoms diminishes by 18 % in 24 hours
(a) 2.1 × 10 - 3   s - 1
(b) 2.1 × 10 - 4   s - 1
(c) 2.1 × 10 - 5   s - 1
(d) 2.1 × 10 - 6   s - 1
 

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