# Question 2b3b7

Jul 9, 2017

14.3 days

#### Explanation:

Since we know the $\text{half life}$ of $\text{Phosphorus-32}$ is $\text{14.3 days}$ and the definition of half life is the the amount of time it takes for the initial sample to decay to half its amount, then we also can establish the following:

color(white)(----)color(blue)["1 gram"color(white)(.)stackrel"decays"-> "0.5 grams = 1 half life has occurred"

and since color(red)["1 half life = 14.3 days", it would take about color(red)["14.3 days"# for the initial sample to decay to half its amount.