A piece of a radioactive material contains 10^20 atoms.If the half life of the material is 20 seconds,the number of disintegration in the first second is
A. 3.47 × 10^18
B.6.93 × 10^20
C. 3.47 × 10^20
D. 6.93 ×10^18?
In Physics
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Asked by Ochuko on 25th February, 2019
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