Question: Radon - 2 2 2 ( 2 2 2 8 6 Rn ) is a radioactive gas with a half - life of 3 .

Radon-222(22286 Rn) is a radioactive gas with a half-life of 3.82 days. A gas sample contains 4.8108 radon atoms initially. a) Determine how many radon atoms will remain after 12 days.b) Determine how many radon nuclei will have decayed by this time.

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