Chemistry, 09.12.2020 07:40 fluchr6174

Need help now Approximate half-life
Radon-222 = 4 days

A sample contains 18mg of radon-222. You estimate that this is 0.01% of the original isotope. How many half-lives have passed?

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Need help now Approximate half-life
Radon-222 = 4 days

A sample contains 18mg of...