Francium-223 has a half-life of 21.80 min. i. How many nuclei are initially present in a 25.0-mg sample of Francium-223? ii. What is its initial activity? iii. How many nuclei will be present 1hr and 49 min later?

Francium-223 has a half-life of 21.80 min. i. How many nuclei are initially present in a 25.0-mg sample of Francium-223? ii. What is its initial activity? iii. How many nuclei will be present 1hr and 49 min later?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter29: Nuclear Physics

Section: Chapter Questions

Problem 51AP

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Francium-223 has a half-life of 21.80 min.

i. How many nuclei are initially present in a 25.0-mg sample of Francium-223?
ii. What is its initial activity?
iii. How many nuclei will be present 1hr and 49 min later?

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