1.

A sample contains 16 gm of a radioactive material, the half life of which is two days. After 32 days, the amount of radioactive material left in the sample is  [NCERT 1984; MNR 1995; MP PMT 1995]

A.            Less than 1 mg                    
B.            \[\frac{1}{4}gm\]
C.            \[\frac{1}{2}gm\]               
D.            1 gm
Answer» B.            \[\frac{1}{4}gm\]


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