1.

The radium and uranium atoms in a sample of uranium mineral are in the ratio of \[1:2.8\times {{10}^{6}}\]. If half-life period of radium is 1620 years, the half-life period of uranium will be [MP PMT 1999]

A. \[45.3\times {{10}^{9}}\] years
B. \[45.3\times {{10}^{10}}\] years
C. \[4.53\times {{10}^{9}}\] years
D. \[4.53\times {{10}^{10}}\] years
Answer» D. \[4.53\times {{10}^{10}}\] years


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