How much of a radioactive kind of promethium will be left after 265 hours if the half-life is 53 hours and you start with 15,488 grams? grams

asked Mar 13, 2023 395 views

3 votes

How much of a radioactive kind of promethium will be left after 265 hours if the half-life is 53

hours and you start with 15,488 grams?
grams

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3 votes

Pretty sure it’s 484 grams.

265 hours and half life is 53 so 265/53=5, so you half 15488 5 times which gives you 484.

Mstringer answered Mar 18, 2023

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