Answer:
The correct answer would be = 1/32.
Explanation:
The half-life is the time required for a quantity to reduce to half of the initial value of an object or element.
it is given that Fluorine-21 has a half-life time = 12 seconds
then in a minute the number of half-lives,
12 seconds = 12/60 of a minute or 1/5 of a minute
This means in 1 minute we will half the sample 5 times.
(1/2)^5 = 1/32 is the fractional remainder
Thus, the correct answer would be 1/32.
