1.

The half-life of radium (226) is 1620 years. The time taken to convert 10 grams of radium to 1.25 grams is [MP PET 1994; UPSEAT 2001]

A.                 810 years            
B.                 1620 years
C.                 3240 years          
D.                 4860 years
Answer» E.


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