Nuclei

Question: The half-life of a sample of a radioactive substance is 1 hour. If $8 \times {10^{10}}$ atoms are present at $t = 0$, then the number of atoms decayed in the duration $t = 2$ hour to $t = 4$ hour will be

1) $2 \times {10^{10}}$

2) $1.5 \times {10^{10}}$

3) Zero

4) Infinity

Solution:

Explanation: No Explanation

Radioactivity Modern Physics

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