1.

A radioactive element has half-life of one day. After three days, the amount of the element left will be [MNR 1985; UPSEAT 2000, 01; MH CET 2002]

A.                 1/2 of the original amount
B.                 1/4 of the original amount
C.                 1/8 of the original amount
D.                 1/16 of the original amount
Answer» D.                 1/16 of the original amount


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