Question

A sample of radioactive nuclei initially contains 9.00 ×1010 radon atoms. The half-life of this type...

A sample of radioactive nuclei initially contains 9.00 ×1010 radon atoms. The half-life of this type of nucleus is 450 days. How many nuclei have decayed after 150 days?

OPTIONS:
7.14×1010

6.00×1010

3.00×1010

1.86×1010

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