03-07-2024
Physics

Answered

Radium-223 is a radioactive substance. Radium-223 is an alpha emitter. The half-life of radium-223 is 11 days. A radioactive source contains 1.7 × 10^23 nuclei of radium-223. Calculate the number of radium-223 nuclei remaining in the source after a time of 33 days.

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