The half-life of calcium-47 about 5 days. Starting with 64 g of this isotope, what would be the amount remaining after 20 days?
1 Answer
Aug 3, 2016
The answer is 4 g.
Explanation:
Divide 64 by 2 four times, because there are four half-lives in 20 days.
Every half-life, the calcium-47 will lose half of the amount remaining.